diff --git a/tests/unit/security/validity-period.t.cpp b/tests/unit/security/validity-period.t.cpp
new file mode 100644
index 0000000..14d2a0f
--- /dev/null
+++ b/tests/unit/security/validity-period.t.cpp
@@ -0,0 +1,200 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2018 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "security/validity-period.hpp"
+
+#include "boost-test.hpp"
+#include "../unit-test-time-fixture.hpp"
+
+#include <boost/lexical_cast.hpp>
+
+namespace ndn {
+namespace security {
+namespace tests {
+
+using namespace ndn::tests;
+
+BOOST_AUTO_TEST_SUITE(Security)
+BOOST_AUTO_TEST_SUITE(TestValidityPeriod)
+
+BOOST_FIXTURE_TEST_CASE(ConstructorSetter, UnitTestTimeFixture)
+{
+  time::system_clock::TimePoint now = this->systemClock->getNow();
+
+  time::system_clock::TimePoint notBefore = now - 1_day;
+  time::system_clock::TimePoint notAfter = notBefore + 2_days;
+
+  ValidityPeriod validity1 = ValidityPeriod(notBefore, notAfter);
+
+  auto period = validity1.getPeriod();
+  BOOST_CHECK_GE(period.first, notBefore); // fractional seconds will be removed
+  BOOST_CHECK_LT(period.first, notBefore + 1_s);
+
+  BOOST_CHECK_LE(period.second, notAfter); // fractional seconds will be removed
+  BOOST_CHECK_GT(period.second, notAfter - 1_s);
+  BOOST_CHECK_EQUAL(validity1.isValid(), true);
+
+  BOOST_CHECK_EQUAL(ValidityPeriod(now - 2_days, now - 1_day).isValid(), false);
+
+  BOOST_CHECK_NO_THROW((ValidityPeriod()));
+  ValidityPeriod validity2;
+  BOOST_CHECK_EQUAL(validity2.isValid(), false);
+
+  validity2.setPeriod(notBefore, notAfter);
+  BOOST_CHECK(validity2.getPeriod() != std::make_pair(time::getUnixEpoch(), time::getUnixEpoch()));
+  BOOST_CHECK_EQUAL(validity2, validity1);
+
+  validity1.setPeriod(time::getUnixEpoch(), time::getUnixEpoch() + 10 * 365_days);
+  BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(validity1),
+                    "(19700101T000000, 19791230T000000)");
+
+  validity1.setPeriod(time::getUnixEpoch() + 1_ns,
+                      time::getUnixEpoch() + (10 * 365_days) + 1_ns);
+  BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(validity1),
+                    "(19700101T000001, 19791230T000000)");
+
+  BOOST_CHECK_EQUAL(ValidityPeriod(now, now).isValid(), true);
+  BOOST_CHECK_EQUAL(ValidityPeriod(now + 1_s, now).isValid(), false);
+}
+
+const uint8_t VP1[] = {
+  0xfd, 0x00, 0xfd, 0x26, // ValidityPeriod
+    0xfd, 0x00, 0xfe, 0x0f, // NotBefore
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x31, // 19700101T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+    0xfd, 0x00, 0xff, 0x0f, // NotAfter
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x32, // 19700102T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30
+};
+
+BOOST_AUTO_TEST_CASE(EncodingDecoding)
+{
+  time::system_clock::TimePoint notBefore = time::getUnixEpoch();
+  time::system_clock::TimePoint notAfter = notBefore + 1_day;
+
+  ValidityPeriod v1(notBefore, notAfter);
+
+  BOOST_CHECK_EQUAL_COLLECTIONS(v1.wireEncode().begin(), v1.wireEncode().end(),
+                                VP1, VP1 + sizeof(VP1));
+
+  BOOST_REQUIRE_NO_THROW(ValidityPeriod(Block(VP1, sizeof(VP1))));
+  Block block(VP1, sizeof(VP1));
+  ValidityPeriod v2(block);
+  BOOST_CHECK(v1.getPeriod() == v2.getPeriod());
+}
+
+const uint8_t VP_E1[] = {
+  0xfd, 0x00, 0xff, 0x26, // ValidityPeriod (error)
+    0xfd, 0x00, 0xfe, 0x0f, // NotBefore
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x31, // 19700101T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+    0xfd, 0x00, 0xff, 0x0f, // NotAfter
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x32, // 19700102T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30
+};
+
+const uint8_t VP_E2[] = {
+  0xfd, 0x00, 0xfd, 0x26, // ValidityPeriod
+    0xfd, 0x00, 0xff, 0x0f, // NotBefore (error)
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x31, // 19700101T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+    0xfd, 0x00, 0xff, 0x0f, // NotAfter
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x32, // 19700102T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30
+};
+
+const uint8_t VP_E3[] = {
+  0xfd, 0x00, 0xfd, 0x26, // ValidityPeriod
+    0xfd, 0x00, 0xfe, 0x0f, // NotBefore
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x31, // 19700101T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+    0xfd, 0x00, 0xfe, 0x0f, // NotAfter (error)
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x32, // 19700102T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30
+};
+
+const uint8_t VP_E4[] = {
+  0xfd, 0x00, 0xfd, 0x39, // ValidityPeriod
+    0xfd, 0x00, 0xfe, 0x0f, // NotBefore
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x31, // 19700101T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+    0xfd, 0x00, 0xff, 0x0f, // NotAfter
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x32, // 19700102T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+    0xfd, 0x00, 0xff, 0x0f, // NotAfter (error)
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x32, // 19700102T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30
+};
+
+const uint8_t VP_E5[] = {
+  0xfd, 0x00, 0xfd, 0x13, // ValidityPeriod
+    0xfd, 0x00, 0xfe, 0x0f, // NotBefore
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x31, // 19700101T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30
+};
+
+const uint8_t VP_E6[] = {
+  0xfd, 0x00, 0xfd, 0x26, // ValidityPeriod
+    0xfd, 0x00, 0xfe, 0x0f, // NotBefore
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x31, // 19700101T00000\xFF
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0xFF,
+    0xfd, 0x00, 0xff, 0x0f, // NotAfter
+      0x31, 0x39, 0x37, 0x30, 0x30, 0x31, 0x30, 0x32, // 19700102T000000
+      0x54, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30
+};
+
+
+BOOST_AUTO_TEST_CASE(DecodingError)
+{
+  BOOST_CHECK_THROW(ValidityPeriod(Block(VP_E1, sizeof(VP_E1))), ValidityPeriod::Error);
+
+  BOOST_CHECK_THROW(ValidityPeriod(Block(VP_E2, sizeof(VP_E2))), ValidityPeriod::Error);
+  BOOST_CHECK_THROW(ValidityPeriod(Block(VP_E3, sizeof(VP_E3))), ValidityPeriod::Error);
+
+  BOOST_CHECK_THROW(ValidityPeriod(Block(VP_E4, sizeof(VP_E4))), ValidityPeriod::Error);
+  BOOST_CHECK_THROW(ValidityPeriod(Block(VP_E5, sizeof(VP_E5))), ValidityPeriod::Error);
+
+  Block emptyBlock;
+  BOOST_CHECK_THROW((ValidityPeriod(emptyBlock)), ValidityPeriod::Error);
+
+  BOOST_CHECK_THROW(ValidityPeriod(Block(VP_E6, sizeof(VP_E6))), ValidityPeriod::Error);
+}
+
+BOOST_AUTO_TEST_CASE(Comparison)
+{
+  time::system_clock::TimePoint notBefore = time::getUnixEpoch();
+  time::system_clock::TimePoint notAfter = notBefore + 1_day;
+  time::system_clock::TimePoint notAfter2 = notBefore + 2_days;
+
+  ValidityPeriod validity1(notBefore, notAfter);
+  ValidityPeriod validity2(notBefore, notAfter);
+  BOOST_CHECK(validity1 == validity2);
+
+  ValidityPeriod validity3(notBefore, notAfter2);
+  BOOST_CHECK(validity1 != validity3);
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestValidityPeriod
+BOOST_AUTO_TEST_SUITE_END() // Security
+
+} // namespace tests
+} // namespace security
+} // namespace ndn