DES: Data Encryption Standard, an important symmetric block cipher

• Description

  This core is the fully compliant implementation of the NIST FIPS PUB 46-3 Data Encryption Algorithm (DES).

  The DES core accepts a 64 bit plaintext input word (Data_in) and generates 64 bit ciphertext word using a supplied 56 bit key (Key). Standard DES as described required 16 rounds for a complete encryption.

• Features of Implemented Core

  • Both encryption and decryption are supported.
  • Encryption and Decryption are performed in 16 clock cycles
  • Suitable for Electronic Codebook (ECB), Cipher Block
  • Chaining (CBC), CFB and OFB implementations
  • No dead cycles for key loading and mode changing
  • Core available in synthesizable VHDL

• Core Facts