diff --git a/lib/src/exceptions.dart b/lib/src/exceptions.dart
index 1001df1..690d137 100644
--- a/lib/src/exceptions.dart
+++ b/lib/src/exceptions.dart
@@ -6,12 +6,20 @@ class NativeCryptoException implements Exception {
   NativeCryptoException(this.message);
 }
 
+class UtilsException extends NativeCryptoException {
+  UtilsException(message) : super(message);
+}
+
 class KeyException extends NativeCryptoException {
   KeyException(message) : super(message);
 }
 
-class UtilsException extends NativeCryptoException {
-  UtilsException(message) : super(message);
+class KeyGenerationException extends NativeCryptoException {
+  KeyGenerationException(message) : super(message);
+}
+
+class KeyPairGenerationException extends NativeCryptoException {
+  KeyPairGenerationException(message) : super(message);
 }
 
 class KeyDerivationException extends NativeCryptoException {
@@ -30,6 +38,10 @@ class DigestInitException extends NativeCryptoException {
   DigestInitException(message) : super(message);
 }
 
+class DigestException extends NativeCryptoException {
+  DigestException(message) : super(message);
+}
+
 class EncryptionException extends NativeCryptoException {
   EncryptionException(message) : super(message);
 }