List of Symmetric Encryption Algorithms. Block and Key Size.

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

Name	Block Size	Key Size	Notes
AES Advanced Encryption Standard	128	128, 192, 256	Is Rijndael
Rijndael	Variable	128, 192, 256	Is AES
Blowfish	64	32-448	Often used in SSH
DES Data Encryption Standard	64	56
Triple DES	64	112-168	DES 3 times
IDEA	64	128	Used in PGP
RC4 Rivest Cipher 4	Stream Cipher	40-2048	Insecure/Not used, used in WEP, WPA, and SSL
RC5 Rivest Cipher 5	32, 64, 128	0-2040
RC6 Rivest Cipher 6	128	128, 192, 256
Skipjack	64	80	Developed by the NSA and supported key escrow
CAST-128	64	40-128
CAST-256	128	128, 160, 192, 224, 256
Twofish	128	1-256
ChaCha20	Stream Cipher	256

List of Common Symmetric Encryption Algorithms With Block and Key Size

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