MD5 & SHA
Description
| MD5 | SHA-1 | SHA-2 | SHA-3 | |
|---|---|---|---|---|
| Release Year | 1992 | 1995 | 2002 | 2008 |
| Output Length | 128 bit | 160 bit | 256/512 bit | 224/256/384/512 bit |
| Hash Collisions | Frequent | Frequent | Rare | Rare |
| Security Level | Low, has been successfully attacked | Low, has been successfully attacked | High | High |
| Applications | Abandoned, still used for data integrity checks | Abandoned | Cryptocurrency transaction verification, digital signatures, etc. | Can be used to replace SHA-2 |
- MD5 and SHA-1 have been successfully attacked multiple times and are thus abandoned in various security applications.
- SHA-2 series, especially SHA-256, is one of the most secure hash algorithms to date, with no successful attacks reported, hence commonly used in various security applications and protocols.
- SHA-3 has lower implementation costs and higher computational efficiency compared to SHA-2, but its current usage coverage is not as extensive as the SHA-2 series.