Cryptography - Algorithm Cheatsheet

Posted Mon, 2013-09-02 23:21 by chaney
Name Type Algorithm Type Size Strength Replaced By
DES Symmetric Block cipher 64 bit (56 + 8 parity) Very weak 3DES
3DES Symmetric Block cipher 192 bit (168 bit + 24 parity) Moderate AES
AES Symmetric Rijndael Block cipher Variable (128, 192, 256) Strong -
RC5 Symmetric RSA Block mode cipher Variable (up to 2048) Very Strong -
RSA Asymmetric Key transport 512 Strong -
Diffie-Hellman Asymmetric Key exchange - Moderate El Gamal
El Gamal Asymmetric Key exchange - Very Strong -
MD5 Hash (Digest) Rivest MD5 Block Hash 512 bit block processing/ 128 bit digest Strong MD6, et. Al.
SHA-1 Hash Rivest SHA Hash 512-bit processing/160 bit digest Very Strong -
HMAC Hash Keyed Digest Variable Very Strong -
ECC Asymmetric Elliptic Curve Variable (smaller key size due to EC, 160-bit EC key = 1025 RSA) Very Strong -
Algorithm Abbrev Block size Key size Rounds
Data Encryption Standard DES 64 bits 56 key (8 parity) 16
International Data Encryption Algorithm IDEA 64 bits 128 bits 8
Advanced Encryption Standard AES 128 bit (restricted by NSA) 128, 192, 256 (Best practice) Variable
(Default  10)
Rivest, Shamir, Adleman RSA - 1024, 2048, 4096 -
Eliptical Curve Cipher EC / ECC - - -