diff --git a/authenc.h b/authenc.h
index a40a538c..ff719872 100644
--- a/authenc.h
+++ b/authenc.h
@@ -3,6 +3,7 @@
 //! \file
 //! \headerfile authenc.h
 //! \brief Base classes for working with authenticated encryption modes of encryption
+//! \since Crypto++ 5.6.0
 
 #ifndef CRYPTOPP_AUTHENC_H
 #define CRYPTOPP_AUTHENC_H
@@ -14,6 +15,7 @@ NAMESPACE_BEGIN(CryptoPP)
 
 //! \class AuthenticatedSymmetricCipherBase
 //! \brief Base implementation for one direction (encryption or decryption) of a stream cipher or block cipher mode with authentication
+//! \since Crypto++ 5.6.0
 class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE AuthenticatedSymmetricCipherBase : public AuthenticatedSymmetricCipher
 {
 public:
diff --git a/ccm.h b/ccm.h
index 87596bee..56815f8e 100644
--- a/ccm.h
+++ b/ccm.h
@@ -2,6 +2,7 @@
 
 //! \file ccm.h
 //! \brief CCM block cipher mode of operation
+//! \since Crypto++ 5.6.0
 
 #ifndef CRYPTOPP_CCM_H
 #define CRYPTOPP_CCM_H
@@ -14,6 +15,7 @@ NAMESPACE_BEGIN(CryptoPP)
 //! \class CCM_Base
 //! \brief CCM block cipher base implementation
 //! \details Base implementation of the AuthenticatedSymmetricCipher interface
+//! \since Crypto++ 5.6.0
 class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CCM_Base : public AuthenticatedSymmetricCipherBase
 {
 public:
@@ -84,6 +86,7 @@ protected:
 //! \tparam T_BlockCipher block cipher
 //! \tparam T_DefaultDigestSize default digest size, in bytes
 //! \tparam T_IsEncryption direction in which to operate the cipher
+//! \since Crypto++ 5.6.0
 template <class T_BlockCipher, int T_DefaultDigestSize, bool T_IsEncryption>
 class CCM_Final : public CCM_Base
 {
@@ -106,6 +109,7 @@ private:
 //! \details \p CCM provides the \p Encryption and \p Decryption typedef. See GCM_Base
 //!   and GCM_Final for the AuthenticatedSymmetricCipher implementation.
 //! \sa <a href="http://www.cryptolounge.org/wiki/CCM">CCM</a> at the Crypto Lounge
+//! \since Crypto++ 5.6.0
 template <class T_BlockCipher, int T_DefaultDigestSize = 16>
 struct CCM : public AuthenticatedSymmetricCipherDocumentation
 {
diff --git a/cmac.h b/cmac.h
index b43ce132..169eda9e 100644
--- a/cmac.h
+++ b/cmac.h
@@ -2,6 +2,7 @@
 
 //! \file cmac.h
 //! \brief Classes for CMAC message authentication code
+//! \since Crypto++ 5.6.0
 
 #ifndef CRYPTOPP_CMAC_H
 #define CRYPTOPP_CMAC_H
@@ -13,6 +14,7 @@ NAMESPACE_BEGIN(CryptoPP)
 
 //! \class CMAC_Base
 //! \brief CMAC base implementation
+//! \since Crypto++ 5.6.0
 class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CMAC_Base : public MessageAuthenticationCode
 {
 public:
@@ -40,6 +42,7 @@ protected:
 //! \tparam T block cipher
 //! \details Template parameter T should be a class derived from BlockCipherDocumentation, for example AES, with a block size of 8, 16, or 32.
 //! \sa <a href="http://www.cryptolounge.org/wiki/CMAC">CMAC</a>
+//! \since Crypto++ 5.6.0
 template <class T>
 class CMAC : public MessageAuthenticationCodeImpl<CMAC_Base, CMAC<T> >, public SameKeyLengthAs<T>
 {
diff --git a/eax.h b/eax.h
index 178522bc..b3e6de4d 100644
--- a/eax.h
+++ b/eax.h
@@ -15,6 +15,7 @@ NAMESPACE_BEGIN(CryptoPP)
 //! \class EAX_Base
 //! \brief EAX block cipher base implementation
 //! \details Base implementation of the AuthenticatedSymmetricCipher interface
+//! \since Crypto++ 5.6.0
 class CRYPTOPP_NO_VTABLE EAX_Base : public AuthenticatedSymmetricCipherBase
 {
 public:
@@ -70,6 +71,7 @@ protected:
 //! \brief EAX block cipher final implementation
 //! \tparam T_BlockCipher block cipher
 //! \tparam T_IsEncryption direction in which to operate the cipher
+//! \since Crypto++ 5.6.0
 template <class T_BlockCipher, bool T_IsEncryption>
 class EAX_Final : public EAX_Base
 {
@@ -94,6 +96,7 @@ private:
 //! \details \p EAX provides the \p Encryption and \p Decryption typedef. See EAX_Base
 //!   and EAX_Final for the AuthenticatedSymmetricCipher implementation.
 //! \sa <a href="http://www.cryptolounge.org/wiki/EAX">EAX</a> at the Crypto Lounge
+//! \since Crypto++ 5.6.0
 template <class T_BlockCipher>
 struct EAX : public AuthenticatedSymmetricCipherDocumentation
 {
diff --git a/gcm.h b/gcm.h
index ab3c927c..d2a4347f 100644
--- a/gcm.h
+++ b/gcm.h
@@ -2,6 +2,7 @@
 
 //! \file gcm.h
 //! \brief GCM block cipher mode of operation
+//! \since Crypto++ 5.6.0
 
 #ifndef CRYPTOPP_GCM_H
 #define CRYPTOPP_GCM_H
@@ -22,6 +23,7 @@ enum GCM_TablesOption {
 //! \class GCM_Base
 //! \brief GCM block cipher base implementation
 //! \details Base implementation of the AuthenticatedSymmetricCipher interface
+//! \since Crypto++ 5.6.0
 class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE GCM_Base : public AuthenticatedSymmetricCipherBase
 {
 public:
@@ -94,6 +96,7 @@ protected:
 //! \tparam T_BlockCipher block cipher
 //! \tparam T_TablesOption table size, either \p GCM_2K_Tables or \p GCM_64K_Tables
 //! \tparam T_IsEncryption direction in which to operate the cipher
+//! \since Crypto++ 5.6.0
 template <class T_BlockCipher, GCM_TablesOption T_TablesOption, bool T_IsEncryption>
 class GCM_Final : public GCM_Base
 {
@@ -116,6 +119,7 @@ private:
 //! \details \p GCM provides the \p Encryption and \p Decryption typedef. See GCM_Base
 //!   and GCM_Final for the AuthenticatedSymmetricCipher implementation.
 //! \sa <a href="http://www.cryptolounge.org/wiki/GCM">GCM</a> at the Crypto Lounge
+//! \since Crypto++ 5.6.0
 template <class T_BlockCipher, GCM_TablesOption T_TablesOption=GCM_2K_Tables>
 struct GCM : public AuthenticatedSymmetricCipherDocumentation
 {
diff --git a/seed.h b/seed.h
index 96158293..f5fd3ca8 100644
--- a/seed.h
+++ b/seed.h
@@ -2,6 +2,7 @@
 
 //! \file seed.h
 //! \brief Classes for the SEED block cipher
+//! \since Crypto++ 5.6.0
 
 #ifndef CRYPTOPP_SEED_H
 #define CRYPTOPP_SEED_H
@@ -13,6 +14,7 @@ NAMESPACE_BEGIN(CryptoPP)
 
 //! \class SEED_Info
 //! \brief SEED block cipher information
+//! \since Crypto++ 5.6.0
 struct SEED_Info : public FixedBlockSize<16>, public FixedKeyLength<16>, public FixedRounds<16>
 {
 	CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "SEED";}
@@ -21,6 +23,7 @@ struct SEED_Info : public FixedBlockSize<16>, public FixedKeyLength<16>, public
 //! \class SEED
 //! \brief SEED block cipher
 //! \sa <a href="http://www.cryptolounge.org/wiki/SEED">SEED</a>
+//! \since Crypto++ 5.6.0
 class SEED : public SEED_Info, public BlockCipherDocumentation
 {
 	class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<SEED_Info>