diff --git a/tests/unit/security/pib/impl/identity-impl.t.cpp b/tests/unit/security/pib/impl/identity-impl.t.cpp
index 3890ddc..1b4527f 100644
--- a/tests/unit/security/pib/impl/identity-impl.t.cpp
+++ b/tests/unit/security/pib/impl/identity-impl.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2020 Regents of the University of California.
+ * Copyright (c) 2013-2021 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -63,14 +63,15 @@
   BOOST_REQUIRE_THROW(identity1.setDefaultKey(id1Key1Name), Pib::Error);
 
   // add key
-  identity1.addKey(id1Key1.data(), id1Key1.size(), id1Key1Name);
+  identity1.addKey(id1Key1, id1Key1Name);
   BOOST_CHECK_NO_THROW(identity1.getKey(id1Key1Name));
 
   // new key becomes default key when there is no default key
   BOOST_REQUIRE_NO_THROW(identity1.getDefaultKey());
   const Key& defaultKey0 = identity1.getDefaultKey();
   BOOST_CHECK_EQUAL(defaultKey0.getName(), id1Key1Name);
-  BOOST_CHECK(defaultKey0.getPublicKey() == id1Key1);
+  BOOST_CHECK_EQUAL_COLLECTIONS(defaultKey0.getPublicKey().begin(), defaultKey0.getPublicKey().end(),
+                                id1Key1.begin(), id1Key1.end());
 
   // remove key
   identity1.removeKey(id1Key1Name);
@@ -78,17 +79,18 @@
   BOOST_CHECK_THROW(identity1.getDefaultKey(), Pib::Error);
 
   // set default key directly
-  BOOST_REQUIRE_NO_THROW(identity1.setDefaultKey(id1Key1.data(), id1Key1.size(), id1Key1Name));
+  BOOST_REQUIRE_NO_THROW(identity1.setDefaultKey(id1Key1, id1Key1Name));
   BOOST_REQUIRE_NO_THROW(identity1.getDefaultKey());
   BOOST_CHECK_NO_THROW(identity1.getKey(id1Key1Name));
 
   // check default key
   const Key& defaultKey1 = identity1.getDefaultKey();
   BOOST_CHECK_EQUAL(defaultKey1.getName(), id1Key1Name);
-  BOOST_CHECK(defaultKey1.getPublicKey() == id1Key1);
+  BOOST_CHECK_EQUAL_COLLECTIONS(defaultKey1.getPublicKey().begin(), defaultKey1.getPublicKey().end(),
+                                id1Key1.begin(), id1Key1.end());
 
   // add another key
-  identity1.addKey(id1Key2.data(), id1Key2.size(), id1Key2Name);
+  identity1.addKey(id1Key2, id1Key2Name);
   BOOST_CHECK_EQUAL(identity1.getKeys().size(), 2);
 
   // set default key through name
@@ -96,7 +98,8 @@
   BOOST_REQUIRE_NO_THROW(identity1.getDefaultKey());
   const Key& defaultKey2 = identity1.getDefaultKey();
   BOOST_CHECK_EQUAL(defaultKey2.getName(), id1Key2Name);
-  BOOST_CHECK(defaultKey2.getPublicKey() == id1Key2);
+  BOOST_CHECK_EQUAL_COLLECTIONS(defaultKey2.getPublicKey().begin(), defaultKey2.getPublicKey().end(),
+                                id1Key2.begin(), id1Key2.end());
 
   // remove key
   identity1.removeKey(id1Key1Name);
@@ -104,10 +107,11 @@
   BOOST_CHECK_EQUAL(identity1.getKeys().size(), 1);
 
   // set default key directly again, change the default setting
-  BOOST_REQUIRE_NO_THROW(identity1.setDefaultKey(id1Key1.data(), id1Key1.size(), id1Key1Name));
+  BOOST_REQUIRE_NO_THROW(identity1.setDefaultKey(id1Key1, id1Key1Name));
   const Key& defaultKey3 = identity1.getDefaultKey();
   BOOST_CHECK_EQUAL(defaultKey3.getName(), id1Key1Name);
-  BOOST_CHECK(defaultKey3.getPublicKey() == id1Key1);
+  BOOST_CHECK_EQUAL_COLLECTIONS(defaultKey3.getPublicKey().begin(), defaultKey3.getPublicKey().end(),
+                                id1Key1.begin(), id1Key1.end());
   BOOST_CHECK_EQUAL(identity1.getKeys().size(), 2);
 
   // remove all keys
@@ -125,11 +129,15 @@
   auto pibImpl = make_shared<pib::PibMemory>();
   IdentityImpl identity1(id1, pibImpl, true);
 
-  identity1.addKey(id1Key1.data(), id1Key1.size(), id1Key1Name);
-  BOOST_CHECK(identity1.getKey(id1Key1Name).getPublicKey() == id1Key1);
+  identity1.addKey(id1Key1, id1Key1Name);
+  auto k1 = identity1.getKey(id1Key1Name);
+  BOOST_CHECK_EQUAL_COLLECTIONS(k1.getPublicKey().begin(), k1.getPublicKey().end(),
+                                id1Key1.begin(), id1Key1.end());
 
-  identity1.addKey(id1Key2.data(), id1Key2.size(), id1Key1Name); // overwriting key should work
-  BOOST_CHECK(identity1.getKey(id1Key1Name).getPublicKey() == id1Key2);
+  identity1.addKey(id1Key2, id1Key1Name); // overwriting key should work
+  auto k2 = identity1.getKey(id1Key1Name);
+  BOOST_CHECK_EQUAL_COLLECTIONS(k2.getPublicKey().begin(), k2.getPublicKey().end(),
+                                id1Key2.begin(), id1Key2.end());
 }
 
 BOOST_AUTO_TEST_CASE(Errors)
@@ -139,11 +147,11 @@
   BOOST_CHECK_THROW(IdentityImpl(id1, pibImpl, false), Pib::Error);
   IdentityImpl identity1(id1, pibImpl, true);
 
-  identity1.addKey(id1Key1.data(), id1Key1.size(), id1Key1Name);
-  BOOST_CHECK_THROW(identity1.addKey(id2Key1.data(), id2Key1.size(), id2Key1Name), std::invalid_argument);
+  identity1.addKey(id1Key1, id1Key1Name);
+  BOOST_CHECK_THROW(identity1.addKey(id2Key1, id2Key1Name), std::invalid_argument);
   BOOST_CHECK_THROW(identity1.removeKey(id2Key1Name), std::invalid_argument);
   BOOST_CHECK_THROW(identity1.getKey(id2Key1Name), std::invalid_argument);
-  BOOST_CHECK_THROW(identity1.setDefaultKey(id2Key1.data(), id2Key1.size(), id2Key1Name), std::invalid_argument);
+  BOOST_CHECK_THROW(identity1.setDefaultKey(id2Key1, id2Key1Name), std::invalid_argument);
   BOOST_CHECK_THROW(identity1.setDefaultKey(id2Key1Name), std::invalid_argument);
 }