diff --git a/hight.h b/hight.h
index 8a0f2a83..0262382b 100644
--- a/hight.h
+++ b/hight.h
@@ -60,7 +60,7 @@ public:
         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation.
     /// \since Crypto++ 8.0
     class CRYPTOPP_NO_VTABLE Dec : public Base
diff --git a/lea.h b/lea.h
index a41bd221..755a1524 100644
--- a/lea.h
+++ b/lea.h
@@ -82,7 +82,7 @@ public:
 #endif
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key and block
     ///   sizes are supported.
     /// \since Crypto++ 8.0
diff --git a/simeck.h b/simeck.h
index e7c84b01..ea25d596 100644
--- a/simeck.h
+++ b/simeck.h
@@ -92,7 +92,7 @@ public:
         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key and block
     ///   sizes are supported.
     /// \since Crypto++ 8.0
@@ -146,7 +146,7 @@ public:
 #endif
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key and block
     ///   sizes are supported.
     /// \since Crypto++ 8.0
diff --git a/simon.h b/simon.h
index ae37503e..8b6f0877 100644
--- a/simon.h
+++ b/simon.h
@@ -126,7 +126,7 @@ public:
 #endif
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key
     ///   sizes are supported.
     /// \since Crypto++ 6.0
@@ -189,7 +189,7 @@ public:
 #endif
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key
     ///   sizes are supported.
     /// \since Crypto++ 6.0
diff --git a/sm4.h b/sm4.h
index efc0c4d8..67f76052 100644
--- a/sm4.h
+++ b/sm4.h
@@ -74,7 +74,7 @@ public:
 #endif
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key
     ///   sizes are supported.
     /// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is
diff --git a/speck.h b/speck.h
index a01c50fd..c7ea1835 100644
--- a/speck.h
+++ b/speck.h
@@ -126,7 +126,7 @@ public:
 #endif
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key
     ///   sizes are supported.
     /// \since Crypto++ 6.0
@@ -189,7 +189,7 @@ public:
 #endif
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key
     ///   sizes are supported.
     /// \since Crypto++ 6.0
diff --git a/threefish.h b/threefish.h
index d98c93ff..cb53d78a 100644
--- a/threefish.h
+++ b/threefish.h
@@ -91,7 +91,7 @@ public:
         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key and block
     ///   sizes are supported.
     /// \since Crypto++ 6.0
@@ -135,7 +135,7 @@ public:
         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
     };
 
-    /// \brief Encryption transformation
+    /// \brief Decryption transformation
     /// \details Dec provides implementation for decryption transformation. All key and block
     ///   sizes are supported.
     /// \since Crypto++ 6.0