List of Symmetric Encryption Algorithms. Block and Key Size.

List of common symmetric encryption algorithms with their block and key size.

NameBlock SizeKey SizeNotes
AES Advanced Encryption Standard128128, 192, 256Is Rijndael
RijndaelVariable128, 192, 256Is AES
Blowfish 6432-448Often used in SSH
DES Data Encryption Standard6456
Triple DES64112-168DES 3 times
IDEA64128Used in PGP
RC4 Rivest Cipher 4Stream Cipher40-2048Insecure/Not used, used in WEP, WPA, and SSL
RC5 Rivest Cipher 532, 64, 1280-2040
RC6 Rivest Cipher 6128128, 192, 256
Skipjack6480Developed by the NSA and supported key escrow
CAST-1286440-128
CAST-256128128, 160, 192, 224, 256
Twofish1281-256
ChaCha20Stream Cipher256
List of Common Symmetric Encryption Algorithms With Block and Key Size