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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

Device Family	Virtex E (xcv200e - 8fg456)
Slices	306
IOB	188
CLKIOB	1
System Clock	100.321 MHz
Throughput	401.284 Mbit/s