Data Encryption Standard (DES)
Data Encryption Standard (DES) is a symmetric cryptographic algorithm. It uses the same key for encryption and decryption. It is a block cipher that encrypts data in 64-bit blocks using a 56-bit key. The key is sometimes completed with an additional byte for parity checks.
DES is now considered insecure and has been replaced by AES.
Attacks
Weak keys
The block cipher DES has a few specific keys termed “weak keys” and “semi-weak keys”. These are keys that cause the encryption mode of DES to act identically to the decryption mode of DES.
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