Hash Functions

CRC - Cyclic Redundancy Check

CRC-32

• Used in PKZIP, GZip, BZip2, PNG, MPEG-2 etc

CRC-64

Message Digest

MD2

• RFC 1319

MD4

• 128-bit Digest length

• used to compute NTLM password-derived key digests in Windows

• RFC 1320

• RFC 6150

MD5

• Proven insecure

• 128-bit Digest Length

• RFC 1321

• First published 1992

SHA - Secure Hash Algorithm

SHA1

• Proven insecure

• 160-bit Digest Length

• RFC 3174

• Descended from MD4

• First published 1995

SHA-256 (SHA-2)

• 256-bit Digest length

• First published 2001

SHA-384 (SHA-2)

• 384-bit Digest length

• First published 2015

SHA-512 (SHA-2)

• 512-bit Digest length

• First published 2015

Others

MACTripleDES

• MACTripleDES is a keyed hashing algorithm (i.e. it encrypts the hash and you need a key to decrypt).

RIPEMD160

• RIPE Message Digest

• Developed in 1996 (based on RIPEMD developed in 1992)

• Used in Bitcoin and some other cryptocurrencies

• Based on MD4

Bibliography