diff --git a/rijndael.h b/rijndael.h
index 3410a800..952c0ba6 100644
--- a/rijndael.h
+++ b/rijndael.h
@@ -38,7 +38,7 @@ struct Rijndael_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 1
 //! \sa <a href="http://www.cryptopp.com/wiki/Rijndael">Rijndael</a>
 class CRYPTOPP_DLL Rijndael : public Rijndael_Info, public BlockCipherDocumentation
 {
-	//! \brief Rijndael block cipher data processing functions
+	//! \brief Rijndael block cipher transformation functions
 	//! \details Provides implementation common to encryption and decryption
 	class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Rijndael_Info>
 	{
diff --git a/shacal2.h b/shacal2.h
index d94cdd28..74af96e7 100644
--- a/shacal2.h
+++ b/shacal2.h
@@ -25,7 +25,7 @@ struct SHACAL2_Info : public FixedBlockSize<32>, public VariableKeyLength<16, 16
 //! \sa <a href="http://www.cryptopp.com/wiki/SHACAL-2">SHACAL-2</a>
 class SHACAL2 : public SHACAL2_Info, public BlockCipherDocumentation
 {
-	//! \brief SHACAL2 block cipher data processing functions
+	//! \brief SHACAL2 block cipher transformation functions
 	//! \details Provides implementation common to encryption and decryption
 	class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<SHACAL2_Info>
 	{
@@ -38,7 +38,7 @@ class SHACAL2 : public SHACAL2_Info, public BlockCipherDocumentation
 		static const word32 K[64];
 	};
 
-	//! \brief SHACAL2 block cipher data processing functions
+	//! \brief SHACAL2 block cipher transformation functions
 	//! \details Provides implementation for encryption transformation
 	class CRYPTOPP_NO_VTABLE Enc : public Base
 	{
@@ -46,7 +46,7 @@ class SHACAL2 : public SHACAL2_Info, public BlockCipherDocumentation
 		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
 	};
 
-	//! \brief SHACAL2 block cipher data processing functions
+	//! \brief SHACAL2 block cipher transformation functions
 	//! \details Provides implementation for decryption transformation
 	class CRYPTOPP_NO_VTABLE Dec : public Base
 	{
diff --git a/threefish.h b/threefish.h
index b06dd029..d9167fee 100644
--- a/threefish.h
+++ b/threefish.h
@@ -74,7 +74,7 @@ struct CRYPTOPP_NO_VTABLE Threefish_Base : public Threefish_Info<BS>
 class CRYPTOPP_NO_VTABLE Threefish256 : public Threefish_Base<32>, public BlockCipherDocumentation
 {
 public:
-    //! \brief Threefish block cipher data processing functions
+    //! \brief Threefish block cipher transformation functions
     //! \details Provides implementation common to encryption and decryption
     //! \since Crypto++ 6.0
     class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Threefish_Base<32> >
@@ -119,7 +119,7 @@ typedef Threefish256::Decryption Threefish256Decryption;
 class CRYPTOPP_NO_VTABLE Threefish512 : public Threefish_Base<64>, public BlockCipherDocumentation
 {
 public:
-    //! \brief Threefish block cipher data processing functions
+    //! \brief Threefish block cipher transformation functions
     //! \details Provides implementation common to encryption and decryption
     //! \since Crypto++ 6.0
     class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Threefish_Base<64> >
@@ -164,7 +164,7 @@ typedef Threefish512::Decryption Threefish512Decryption;
 class CRYPTOPP_NO_VTABLE Threefish1024 : public Threefish_Base<128>, public BlockCipherDocumentation
 {
 public:
-    //! \brief Threefish block cipher data processing functions
+    //! \brief Threefish block cipher transformation functions
     //! \details Provides implementation common to encryption and decryption
     //! \since Crypto++ 6.0
     class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Threefish_Base<128> >