diff --git a/test/message/pack.cpp b/test/message/pack.cpp
index 9e88f2b..2eae1ec 100644
--- a/test/message/pack.cpp
+++ b/test/message/pack.cpp
@@ -28,7 +28,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(v));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x04};
+    ipmi::SecureBuffer k = {0x04};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -40,7 +40,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(v));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x04, 0x86};
+    ipmi::SecureBuffer k = {0x04, 0x86};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -52,7 +52,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(v));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x04, 0x86, 0x00, 0x02};
+    ipmi::SecureBuffer k = {0x04, 0x86, 0x00, 0x02};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -64,7 +64,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(v));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x04, 0x86, 0x00, 0x02, 0x44, 0x33, 0x22, 0x11};
+    ipmi::SecureBuffer k = {0x04, 0x86, 0x00, 0x02, 0x44, 0x33, 0x22, 0x11};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -76,7 +76,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), types::nrFixedBits<decltype(v)> / CHAR_BIT);
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x58, 0x23, 0x11};
+    ipmi::SecureBuffer k = {0x58, 0x23, 0x11};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -93,7 +93,7 @@
                          types::nrFixedBits<decltype(v2)>) /
                             CHAR_BIT);
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0xc9};
+    ipmi::SecureBuffer k = {0xc9};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -108,7 +108,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(uint8_t));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0xc9};
+    ipmi::SecureBuffer k = {0xc9};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -122,7 +122,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), v.size() / CHAR_BIT);
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0xc9};
+    ipmi::SecureBuffer k = {0xc9};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -137,7 +137,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), (v1.size() + v2.size()) / CHAR_BIT);
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0xc9};
+    ipmi::SecureBuffer k = {0xc9};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -152,7 +152,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), v.size() / CHAR_BIT);
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x04, 0x86, 0x00, 0x02};
+    ipmi::SecureBuffer k = {0x04, 0x86, 0x00, 0x02};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -165,7 +165,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(uint16_t) + sizeof(char));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x04, 0x86, 0x41};
+    ipmi::SecureBuffer k = {0x04, 0x86, 0x41};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -178,7 +178,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), v.size() * sizeof(v[0]));
     // check that the bytes were correctly packed (in byte order)
-    std::vector<uint8_t> k = {0x02, 0x00, 0x86, 0x04};
+    ipmi::SecureBuffer k = {0x02, 0x00, 0x86, 0x04};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -197,8 +197,8 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), v.size() * sizeof(v[0]));
     // check that the bytes were correctly packed (in byte order)
-    std::vector<uint8_t> k = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
-                              0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34, 0x12};
+    ipmi::SecureBuffer k = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
+                            0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34, 0x12};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -217,8 +217,8 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), v.size() * sizeof(v[0]));
     // check that the bytes were correctly packed (in byte order)
-    std::vector<uint8_t> k = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
-                              0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34, 0x12};
+    ipmi::SecureBuffer k = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
+                            0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34, 0x12};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -231,7 +231,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), v.size() * sizeof(v[0]));
     // check that the bytes were correctly packed (in byte order)
-    std::vector<uint8_t> k = {0x02, 0x00, 0x86, 0x04};
+    ipmi::SecureBuffer k = {0x02, 0x00, 0x86, 0x04};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -239,21 +239,21 @@
 {
     ipmi::message::Payload p;
     EXPECT_EQ(p.pack(true, std::vector<uint8_t>{1}), 1);
-    EXPECT_EQ(p.raw, std::vector<uint8_t>{0b1});
+    EXPECT_EQ(p.raw, ipmi::SecureBuffer{0b1});
 }
 
 TEST(PackBasics, StringView)
 {
     ipmi::message::Payload p;
     EXPECT_EQ(p.pack(std::string_view{"\x24\x30\x11"}), 0);
-    EXPECT_EQ(p.raw, std::vector<uint8_t>({0x24, 0x30, 0x11}));
+    EXPECT_EQ(p.raw, ipmi::SecureBuffer({0x24, 0x30, 0x11}));
 }
 
 TEST(PackBasics, StringViewUnaligned)
 {
     ipmi::message::Payload p;
     EXPECT_EQ(p.pack(true, std::string_view{"abc"}), 1);
-    EXPECT_EQ(p.raw, std::vector<uint8_t>({0b1}));
+    EXPECT_EQ(p.raw, ipmi::SecureBuffer({0b1}));
 }
 
 TEST(PackBasics, OptionalEmpty)
@@ -265,7 +265,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), 0);
     // check that the bytes were correctly packed (in byte order)
-    std::vector<uint8_t> k = {};
+    ipmi::SecureBuffer k = {};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -278,7 +278,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(uint32_t));
     // check that the bytes were correctly packed (in byte order)
-    std::vector<uint8_t> k = {0x02, 0x00, 0x86, 0x04};
+    ipmi::SecureBuffer k = {0x02, 0x00, 0x86, 0x04};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -287,14 +287,14 @@
     ipmi::message::Payload p;
     EXPECT_EQ(p.pack(true), 0);
     EXPECT_EQ(p.pack(ipmi::message::Payload({0x24, 0x30})), 0);
-    EXPECT_EQ(p.raw, std::vector<uint8_t>({0b1, 0x24, 0x30}));
+    EXPECT_EQ(p.raw, ipmi::SecureBuffer({0b1, 0x24, 0x30}));
 }
 
 TEST(PackBasics, PayloadUnaligned)
 {
     ipmi::message::Payload p;
     EXPECT_EQ(p.pack(true, ipmi::message::Payload({0x24})), 1);
-    EXPECT_EQ(p.raw, std::vector<uint8_t>({0b1}));
+    EXPECT_EQ(p.raw, ipmi::SecureBuffer({0b1}));
 }
 
 TEST(PackBasics, PayloadOtherUnaligned)
@@ -303,7 +303,7 @@
     q.appendBits(1, 1);
     EXPECT_EQ(p.pack(true), 0);
     EXPECT_EQ(p.pack(q), 1);
-    EXPECT_EQ(p.raw, std::vector<uint8_t>({0b1}));
+    EXPECT_EQ(p.raw, ipmi::SecureBuffer({0b1}));
 }
 
 TEST(PackBasics, PrependPayload)
@@ -311,7 +311,7 @@
     ipmi::message::Payload p;
     EXPECT_EQ(p.pack(true), 0);
     EXPECT_EQ(p.prepend(ipmi::message::Payload({0x24, 0x30})), 0);
-    EXPECT_EQ(p.raw, std::vector<uint8_t>({0x24, 0x30, 0b1}));
+    EXPECT_EQ(p.raw, ipmi::SecureBuffer({0x24, 0x30, 0b1}));
 }
 
 TEST(PackBasics, PrependPayloadUnaligned)
@@ -320,7 +320,7 @@
     p.appendBits(1, 1);
     EXPECT_EQ(p.prepend(ipmi::message::Payload({0x24})), 1);
     p.drain();
-    EXPECT_EQ(p.raw, std::vector<uint8_t>({0b1}));
+    EXPECT_EQ(p.raw, ipmi::SecureBuffer({0b1}));
 }
 
 TEST(PackBasics, PrependPayloadOtherUnaligned)
@@ -329,7 +329,7 @@
     q.appendBits(1, 1);
     EXPECT_EQ(p.pack(true), 0);
     EXPECT_EQ(p.prepend(q), 1);
-    EXPECT_EQ(p.raw, std::vector<uint8_t>({0b1}));
+    EXPECT_EQ(p.raw, ipmi::SecureBuffer({0b1}));
 }
 
 TEST(PackAdvanced, Uints)
@@ -348,8 +348,8 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(v1) + sizeof(v2) + sizeof(v3) + sizeof(v4));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x02, 0x04, 0x06, 0x11, 0x22, 0x33, 0x44, 0x55,
-                              0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc};
+    ipmi::SecureBuffer k = {0x02, 0x04, 0x06, 0x11, 0x22, 0x33, 0x44, 0x55,
+                            0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -370,8 +370,8 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(v1) + sizeof(v2) + sizeof(v3) + sizeof(v4));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x02, 0x04, 0x06, 0x11, 0x22, 0x33, 0x44, 0x55,
-                              0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc};
+    ipmi::SecureBuffer k = {0x02, 0x04, 0x06, 0x11, 0x22, 0x33, 0x44, 0x55,
+                            0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -386,7 +386,7 @@
     ASSERT_EQ(p.size(), sizeof(data));
 
     // check that the bytes were correctly packed packed (LSB first)
-    std::vector<uint8_t> k = {2, 4};
+    ipmi::SecureBuffer k = {2, 4};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -410,7 +410,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(uint16_t));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x9e, 0xdb};
+    ipmi::SecureBuffer k = {0x9e, 0xdb};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -444,7 +444,7 @@
     // check that the number of bytes matches
     ASSERT_EQ(p.size(), sizeof(uint64_t));
     // check that the bytes were correctly packed (LSB first)
-    std::vector<uint8_t> k = {0x96, 0xd2, 0x2a, 0xcd, 0xd3, 0x3b, 0xbc, 0x9d};
+    ipmi::SecureBuffer k = {0x96, 0xd2, 0x2a, 0xcd, 0xd3, 0x3b, 0xbc, 0x9d};
     ASSERT_EQ(p.raw, k);
 }
 
@@ -485,13 +485,13 @@
                             sizeof(uint16_t));
     uint8_t protocol_channel =
         (static_cast<uint8_t>(protocol) << 4) | static_cast<uint8_t>(channel);
-    std::vector<uint8_t> k = {handle, maxSessions, currentSessions, userID,
-                              priv, protocol_channel,
-                              // ip addr
-                              0x05, 0x01, 0x01, 0x0a,
-                              // mac addr
-                              0, 0, 0, 0, 0, 0,
-                              // port
-                              0x1f, 0xd8};
+    ipmi::SecureBuffer k = {handle, maxSessions, currentSessions, userID, priv,
+                            protocol_channel,
+                            // ip addr
+                            0x05, 0x01, 0x01, 0x0a,
+                            // mac addr
+                            0, 0, 0, 0, 0, 0,
+                            // port
+                            0x1f, 0xd8};
     ASSERT_EQ(p.raw, k);
 }
diff --git a/test/message/payload.cpp b/test/message/payload.cpp
index 56d8d41..7c55e7e 100644
--- a/test/message/payload.cpp
+++ b/test/message/payload.cpp
@@ -25,9 +25,9 @@
 
 TEST(Payload, InputSize)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
     size_t input_size = i.size();
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     ASSERT_EQ(input_size, p.size());
 }
 
@@ -35,7 +35,7 @@
 {
     ipmi::message::Payload p;
     ASSERT_EQ(0, p.size());
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
     p.pack(i);
     ASSERT_EQ(i.size(), p.size());
     p.pack(i);
@@ -45,7 +45,7 @@
 
 TEST(Payload, Resize)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
     ipmi::message::Payload p;
     p.pack(i);
     p.resize(16);
@@ -54,7 +54,7 @@
 
 TEST(Payload, Data)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
     ipmi::message::Payload p;
     p.pack(i);
     ASSERT_NE(nullptr, p.data());
@@ -92,7 +92,7 @@
     ASSERT_EQ(p.bitCount, 0);
     // appended 8 bits, should be one byte
     ASSERT_EQ(p.size(), 1);
-    std::vector<uint8_t> k1 = {0b11100101};
+    ipmi::SecureBuffer k1 = {0b11100101};
     ASSERT_EQ(p.raw, k1);
     p.appendBits(7, 0b1110111);
     // appended 7 more bits, should still be one byte
@@ -100,7 +100,7 @@
     p.drain();
     // drain forces padding; should be two bytes now
     ASSERT_EQ(p.size(), 2);
-    std::vector<uint8_t> k2 = {0b11100101, 0b01110111};
+    ipmi::SecureBuffer k2 = {0b11100101, 0b01110111};
     ASSERT_EQ(p.raw, k2);
 }
 
@@ -113,7 +113,7 @@
     ASSERT_EQ(p.size(), 2);
     ASSERT_EQ(p.bitCount, 0);
     ASSERT_EQ(p.bitStream, 0);
-    std::vector<uint8_t> k1 = {0b11001111, 0b10110100};
+    ipmi::SecureBuffer k1 = {0b11001111, 0b10110100};
     ASSERT_EQ(p.raw, k1);
 }
 
@@ -126,7 +126,7 @@
     ASSERT_EQ(p.size(), 2);
     ASSERT_EQ(p.bitCount, 0);
     ASSERT_EQ(p.bitStream, 0);
-    std::vector<uint8_t> k1 = {0b1100111, 0b1011010};
+    ipmi::SecureBuffer k1 = {0b1100111, 0b1011010};
     ASSERT_EQ(p.raw, k1);
 }
 
@@ -140,14 +140,14 @@
     ASSERT_EQ(p.size(), 1);
     ASSERT_EQ(p.bitCount, 7);
     ASSERT_EQ(p.bitStream, 0b1011010);
-    std::vector<uint8_t> k1 = {0b1100111};
+    ipmi::SecureBuffer k1 = {0b1100111};
     ASSERT_EQ(p.raw, k1);
 }
 
 TEST(PayloadRequest, Pop)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     const auto& [vb, ve] = p.pop<uint8_t>(4);
     std::vector<uint8_t> v(vb, ve);
     std::vector<uint8_t> k = {0xbf, 0x04, 0x86, 0x00};
@@ -156,8 +156,8 @@
 
 TEST(PayloadRequest, FillBits)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     p.fillBits(5);
     ASSERT_FALSE(p.unpackError);
     ASSERT_EQ(p.bitStream, 0xbf);
@@ -178,24 +178,24 @@
 
 TEST(PayloadRequest, FillBitsTooManyBits)
 {
-    std::vector<uint8_t> i = {1, 2, 3, 4, 5, 6, 7, 8, 9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {1, 2, 3, 4, 5, 6, 7, 8, 9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     p.fillBits(72);
     ASSERT_TRUE(p.unpackError);
 }
 
 TEST(PayloadRequest, FillBitsNotEnoughBytes)
 {
-    std::vector<uint8_t> i = {1, 2, 3, 4};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {1, 2, 3, 4};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     p.fillBits(48);
     ASSERT_TRUE(p.unpackError);
 }
 
 TEST(PayloadRequest, PopBits)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     p.fillBits(4);
     uint8_t v = p.popBits(4);
     ASSERT_FALSE(p.unpackError);
@@ -206,16 +206,16 @@
 
 TEST(PayloadRequest, PopBitsNoFillBits)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     p.popBits(4);
     ASSERT_TRUE(p.unpackError);
 }
 
 TEST(PayloadRequest, DiscardBits)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     p.fillBits(5);
     ASSERT_FALSE(p.unpackError);
     ASSERT_EQ(p.bitStream, 0xbf);
@@ -228,8 +228,8 @@
 
 TEST(PayloadRequest, FullyUnpacked)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint32_t v1;
     p.unpack(v1);
     // still one remaining byte
@@ -249,8 +249,8 @@
 
 TEST(PayloadRequest, ResetInternal)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     p.fillBits(4);
     p.unpackError = true;
     p.reset();
@@ -265,8 +265,8 @@
     // Payload.reset is used to rewind the unpacking to the initial
     // state. This is needed so that OEM commands can unpack the group
     // number or the IANA to determine which handler needs to be called
-    std::vector<uint8_t> i = {0x04, 0x86};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint8_t v1;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v1), 0);
@@ -290,8 +290,8 @@
 
 TEST(PayloadRequest, PartialPayload)
 {
-    std::vector<uint8_t> i = {0xbf, 0x04, 0x86, 0x00, 0x02};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xbf, 0x04, 0x86, 0x00, 0x02};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint8_t v1;
     ipmi::message::Payload localPayload;
     // check that the number of bytes matches
diff --git a/test/message/unpack.cpp b/test/message/unpack.cpp
index 7d69218..66c890a 100644
--- a/test/message/unpack.cpp
+++ b/test/message/unpack.cpp
@@ -20,8 +20,8 @@
 
 TEST(Uints, Uint8)
 {
-    std::vector<uint8_t> i = {0x04};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint8_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -34,8 +34,8 @@
 
 TEST(Uints, Uint8TooManyBytes)
 {
-    std::vector<uint8_t> i = {0x04, 0x86};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint8_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -48,8 +48,8 @@
 
 TEST(Uints, Uint8InsufficientBytes)
 {
-    std::vector<uint8_t> i = {};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint8_t v = 0;
     // check that the number of bytes matches
     ASSERT_NE(p.unpack(v), 0);
@@ -61,8 +61,8 @@
 
 TEST(Uints, Uint16)
 {
-    std::vector<uint8_t> i = {0x04, 0x86};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint16_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -75,8 +75,8 @@
 
 TEST(Uints, Uint16TooManyBytes)
 {
-    std::vector<uint8_t> i = {0x04, 0x86, 0x00};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86, 0x00};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint16_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -89,8 +89,8 @@
 
 TEST(Uints, Uint16InsufficientBytes)
 {
-    std::vector<uint8_t> i = {0x04};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint16_t v = 0;
     // check that the number of bytes matches
     ASSERT_NE(p.unpack(v), 0);
@@ -102,8 +102,8 @@
 
 TEST(Uints, Uint32)
 {
-    std::vector<uint8_t> i = {0x04, 0x86, 0x00, 0x02};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86, 0x00, 0x02};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint32_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -116,8 +116,8 @@
 
 TEST(Uints, Uint32TooManyBytes)
 {
-    std::vector<uint8_t> i = {0x04, 0x86, 0x00, 0x02, 0x44};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86, 0x00, 0x02, 0x44};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint32_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -130,8 +130,8 @@
 
 TEST(Uints, Uint32InsufficientBytes)
 {
-    std::vector<uint8_t> i = {0x04, 0x86, 0x00};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86, 0x00};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint32_t v = 0;
     // check that the number of bytes matches
     ASSERT_NE(p.unpack(v), 0);
@@ -143,8 +143,8 @@
 
 TEST(Uints, Uint64)
 {
-    std::vector<uint8_t> i = {0x04, 0x86, 0x00, 0x02, 0x44, 0x33, 0x22, 0x11};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86, 0x00, 0x02, 0x44, 0x33, 0x22, 0x11};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint64_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -157,9 +157,9 @@
 
 TEST(Uints, Uint64TooManyBytes)
 {
-    std::vector<uint8_t> i = {0x04, 0x86, 0x00, 0x02, 0x44,
-                              0x33, 0x22, 0x11, 0x55};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86, 0x00, 0x02, 0x44,
+                            0x33, 0x22, 0x11, 0x55};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint64_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -172,8 +172,8 @@
 
 TEST(Uints, Uint64InsufficientBytes)
 {
-    std::vector<uint8_t> i = {0x04, 0x86, 0x00, 0x02, 0x44, 0x33, 0x22};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x04, 0x86, 0x00, 0x02, 0x44, 0x33, 0x22};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint64_t v = 0;
     // check that the number of bytes matches
     ASSERT_NE(p.unpack(v), 0);
@@ -185,8 +185,8 @@
 
 TEST(Uints, Uint24)
 {
-    std::vector<uint8_t> i = {0x58, 0x23, 0x11};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x58, 0x23, 0x11};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint24_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -199,8 +199,8 @@
 
 TEST(FixedInts, Uint24TooManyBytes)
 {
-    std::vector<uint8_t> i = {0x58, 0x23, 0x11, 0x00};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x58, 0x23, 0x11, 0x00};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint24_t v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -213,8 +213,8 @@
 
 TEST(FixedInts, Uint24InsufficientBytes)
 {
-    std::vector<uint8_t> i = {0x58, 0x23};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x58, 0x23};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint24_t v = 0;
     // check that the number of bytes matches
     ASSERT_NE(p.unpack(v), 0);
@@ -228,8 +228,8 @@
 {
     // individual bytes are unpacked low-order-bits first
     // v1 will use [2:0], v2 will use [7:3]
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint3_t v1;
     uint5_t v2;
     // check that the number of bytes matches
@@ -246,8 +246,8 @@
 TEST(FixedInts, Uint3Uint4TooManyBits)
 {
     // high order bit should not get unpacked
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint3_t v1;
     uint4_t v2;
     // check that the number of bytes matches
@@ -264,8 +264,8 @@
 TEST(FixedInts, Uint3Uint6InsufficientBits)
 {
     // insufficient bits to unpack v2
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint3_t v1;
     uint6_t v2;
     // check that the number of bytes matches
@@ -283,8 +283,8 @@
 {
     // individual bytes are unpacked low-order-bits first
     // [v8, v7, v6, v5, v4, v3, v2, v1]
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     bool v8, v7, v6, v5;
     bool v4, v3, v2, v1;
     // check that the number of bytes matches
@@ -309,8 +309,8 @@
     // high order bit should not get unpacked
     // individual bytes are unpacked low-order-bits first
     // [v7, v6, v5, v4, v3, v2, v1]
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     bool v7, v6, v5;
     bool v4, v3, v2, v1;
     // check that the number of bytes matches
@@ -333,8 +333,8 @@
 {
     // individual bytes are unpacked low-order-bits first
     // [v8, v7, v6, v5, v4, v3, v2, v1]
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     bool v9;
     bool v8, v7, v6, v5;
     bool v4, v3, v2, v1;
@@ -359,8 +359,8 @@
 {
     // individual bytes are unpacked low-order-bits first
     // a bitset for 8 bits fills the full byte
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::bitset<8> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -375,8 +375,8 @@
 {
     // individual bytes are unpacked low-order-bits first
     // a bitset for 8 bits fills the full byte
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::bitset<7> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -391,8 +391,8 @@
 {
     // individual bytes are unpacked low-order-bits first
     // a bitset for 8 bits fills the full byte
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::bitset<9> v;
     // check that the number of bytes matches
     ASSERT_NE(p.unpack(v), 0);
@@ -407,8 +407,8 @@
 {
     // individual bytes are unpacked low-order-bits first
     // v1 will use [2:0], v2 will use [7:3]
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::bitset<3> v1;
     std::bitset<5> v2;
     // check that the number of bytes matches
@@ -425,8 +425,8 @@
 TEST(Bitsets, Bitset3Bitset4TooManyBits)
 {
     // high order bit should not get unpacked
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::bitset<3> v1;
     std::bitset<4> v2;
     // check that the number of bytes matches
@@ -443,8 +443,8 @@
 TEST(Bitsets, Bitset3Bitset6InsufficientBits)
 {
     // insufficient bits to unpack v2
-    std::vector<uint8_t> i = {0xc9};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xc9};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::bitset<3> v1;
     std::bitset<6> v2;
     // check that the number of bytes matches
@@ -463,8 +463,8 @@
     // individual bytes are unpacked low-order-bits first
     // v1 will use 4 bytes, but in LSByte first order
     // v1[7:0] v1[15:9] v1[23:16] v1[31:24]
-    std::vector<uint8_t> i = {0xb4, 0x86, 0x91, 0xc2};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xb4, 0x86, 0x91, 0xc2};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::bitset<32> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -478,8 +478,8 @@
 TEST(Bitsets, Bitset31TooManyBits)
 {
     // high order bit should not get unpacked
-    std::vector<uint8_t> i = {0xb4, 0x86, 0x91, 0xc2};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xb4, 0x86, 0x91, 0xc2};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::bitset<31> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -493,8 +493,8 @@
 TEST(Bitsets, Bitset33InsufficientBits)
 {
     // insufficient bits to unpack v2
-    std::vector<uint8_t> i = {0xb4, 0x86, 0x91, 0xc2};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xb4, 0x86, 0x91, 0xc2};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::bitset<33> v;
     // check that the number of bytes matches
     ASSERT_NE(p.unpack(v), 0);
@@ -508,8 +508,8 @@
 TEST(Arrays, Array4xUint8)
 {
     // an array of bytes will be read verbatim, low-order element first
-    std::vector<uint8_t> i = {0x02, 0x00, 0x86, 0x04};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x02, 0x00, 0x86, 0x04};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::array<uint8_t, 4> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -524,8 +524,8 @@
 {
     // last byte should not get unpacked
     // an array of bytes will be read verbatim, low-order element first
-    std::vector<uint8_t> i = {0x02, 0x00, 0x86, 0x04, 0x22};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x02, 0x00, 0x86, 0x04, 0x22};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::array<uint8_t, 4> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -540,8 +540,8 @@
 {
     // last byte should not get unpacked
     // an array of bytes will be read verbatim, low-order element first
-    std::vector<uint8_t> i = {0x02, 0x00, 0x86};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x02, 0x00, 0x86};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::array<uint8_t, 4> v;
     // check that the number of bytes matches
     ASSERT_NE(p.unpack(v), 0);
@@ -562,9 +562,9 @@
     // v[1][7:0] v[1][15:9] v[1][23:16] v[1][31:24]
     // v[2][7:0] v[2][15:9] v[2][23:16] v[2][31:24]
     // v[3][7:0] v[3][15:9] v[3][23:16] v[3][31:24]
-    std::vector<uint8_t> i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
-                              0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34, 0x12};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
+                            0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34, 0x12};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::array<uint32_t, 4> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -585,10 +585,10 @@
     // v[1][7:0] v[1][15:9] v[1][23:16] v[1][31:24]
     // v[2][7:0] v[2][15:9] v[2][23:16] v[2][31:24]
     // v[3][7:0] v[3][15:9] v[3][23:16] v[3][31:24]
-    std::vector<uint8_t> i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66,
-                              0x44, 0x22, 0x99, 0x77, 0x55, 0x33,
-                              0x78, 0x56, 0x34, 0x12, 0xaa};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66,
+                            0x44, 0x22, 0x99, 0x77, 0x55, 0x33,
+                            0x78, 0x56, 0x34, 0x12, 0xaa};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::array<uint32_t, 4> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -609,9 +609,9 @@
     // v[1][7:0] v[1][15:9] v[1][23:16] v[1][31:24]
     // v[2][7:0] v[2][15:9] v[2][23:16] v[2][31:24]
     // v[3][7:0] v[3][15:9] v[3][23:16] v[3][31:24]
-    std::vector<uint8_t> i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
-                              0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
+                            0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::array<uint32_t, 4> v;
     // check that the number of bytes matches
     ASSERT_NE(p.unpack(v), 0);
@@ -631,9 +631,9 @@
     // v[1][7:0] v[1][15:9] v[1][23:16] v[1][31:24]
     // v[2][7:0] v[2][15:9] v[2][23:16] v[2][31:24]
     // v[3][7:0] v[3][15:9] v[3][23:16] v[3][31:24]
-    std::vector<uint8_t> i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
-                              0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34, 0x12};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
+                            0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34, 0x12};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::vector<uint32_t> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -656,9 +656,9 @@
     // v[1][7:0] v[1][15:9] v[1][23:16] v[1][31:24]
     // v[2][7:0] v[2][15:9] v[2][23:16] v[2][31:24]
     // v[3][7:0] v[3][15:9] v[3][23:16] v[3][31:24]
-    std::vector<uint8_t> i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
-                              0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x44, 0x33, 0x22, 0x11, 0x88, 0x66, 0x44, 0x22,
+                            0x99, 0x77, 0x55, 0x33, 0x78, 0x56, 0x34};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::vector<uint32_t> v;
     // check that the vector unpacks successfully
     ASSERT_EQ(p.unpack(v), 0);
@@ -674,8 +674,8 @@
 TEST(Vectors, VectorUint8)
 {
     // a vector of bytes will be unpacked verbatim, low-order element first
-    std::vector<uint8_t> i = {0x02, 0x00, 0x86, 0x04};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x02, 0x00, 0x86, 0x04};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::vector<uint8_t> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -689,8 +689,8 @@
 TEST(Vectors, VectorEmptyOk)
 {
     // an empty input vector to show that unpacking elements is okay
-    std::vector<uint8_t> i{};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i{};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::vector<uint32_t> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -704,8 +704,8 @@
 TEST(Vectors, VectorOfTuplesOk)
 {
     // a vector of bytes will be unpacked verbatim, low-order element first
-    std::vector<uint8_t> i = {0x02, 0x00, 0x86, 0x04};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x02, 0x00, 0x86, 0x04};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::vector<std::tuple<uint8_t, uint8_t>> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -719,8 +719,8 @@
 TEST(Vectors, VectorOfTuplesInsufficientBytes)
 {
     // a vector of bytes will be unpacked verbatim, low-order element first
-    std::vector<uint8_t> i = {0x02, 0x00, 0x86, 0x04, 0xb4};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x02, 0x00, 0x86, 0x04, 0xb4};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::vector<std::tuple<uint8_t, uint8_t>> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -739,8 +739,8 @@
 TEST(UnpackAdvanced, OptionalOk)
 {
     // a vector of bytes will be unpacked verbatim, low-order element first
-    std::vector<uint8_t> i = {0xbe, 0x02, 0x00, 0x86, 0x04};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0xbe, 0x02, 0x00, 0x86, 0x04};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::optional<std::tuple<uint8_t, uint32_t>> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -754,8 +754,8 @@
 TEST(UnpackAdvanced, OptionalInsufficientBytes)
 {
     // a vector of bytes will be unpacked verbatim, low-order element first
-    std::vector<uint8_t> i = {0x02, 0x00, 0x86, 0x04};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x02, 0x00, 0x86, 0x04};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     std::optional<std::tuple<uint8_t, uint32_t>> v;
     // check that the number of bytes matches
     ASSERT_EQ(p.unpack(v), 0);
@@ -773,9 +773,9 @@
     // v1[7:0] v2[7:0] v2[15:8] v3[7:0] v3[15:8] v3[23:16] v3[31:24]
     // v4[7:0] v4[15:8] v4[23:16] v4[31:24]
     // v4[39:25] v4[47:40] v4[55:48] v4[63:56]
-    std::vector<uint8_t> i = {0x02, 0x04, 0x06, 0x11, 0x22, 0x33, 0x44, 0x55,
-                              0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x02, 0x04, 0x06, 0x11, 0x22, 0x33, 0x44, 0x55,
+                            0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint8_t v1;
     uint16_t v2;
     uint32_t v3;
@@ -802,9 +802,9 @@
     // v1[7:0] v2[7:0] v2[15:8] v3[7:0] v3[15:8] v3[23:16] v3[31:24]
     // v4[7:0] v4[15:8] v4[23:16] v4[31:24]
     // v4[39:25] v4[47:40] v4[55:48] v4[63:56]
-    std::vector<uint8_t> i = {0x02, 0x04, 0x06, 0x11, 0x22, 0x33, 0x44, 0x55,
-                              0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x02, 0x04, 0x06, 0x11, 0x22, 0x33, 0x44, 0x55,
+                            0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint8_t v1;
     uint16_t v2;
     uint32_t v3;
@@ -832,8 +832,8 @@
     // v3[4:0] will use k[0][7:3], v3[6:5] will use k[1][1:0]
     // v4 will use k[1][2]
     // v5 will use k[1][7:3]
-    std::vector<uint8_t> i = {0x9e, 0xdb};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x9e, 0xdb};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint2_t v1;
     bool v2;
     std::bitset<7> v3;
@@ -871,8 +871,8 @@
     // v6[19:12] will use k[5][7:0] v6[27:20] will use k[6][7:0]
     // v6[31:28] will use k[7][3:0]
     // v7 will use k[7][7:4]
-    std::vector<uint8_t> i = {0x96, 0xd2, 0x2a, 0xcd, 0xd3, 0x3b, 0xbc, 0x9d};
-    ipmi::message::Payload p(std::forward<std::vector<uint8_t>>(i));
+    ipmi::SecureBuffer i = {0x96, 0xd2, 0x2a, 0xcd, 0xd3, 0x3b, 0xbc, 0x9d};
+    ipmi::message::Payload p(std::forward<ipmi::SecureBuffer>(i));
     uint2_t v1;
     uint8_t v2;
     bool v3;