WD2001 Datasheet | Western Digital

c o R p o R A TI o N C=~~~~==~~==~~~====~========~~======~======~O co Features - REMOTE AND HOST PUTER MUNICA- ~ - CERTIFIED BY NATIONAL BUREAU OF STAN- TIONS DARDS. - SECURE A/D - TRANSFER RATE: 1.3M BITS/SEC (2 MHz CLOCK) - SECURE DISK OR MAG TAPE DATA STORAGE (HIGHER SPEEDS AVAILABLE) - SECURE PACKET SWITCHING TRANSMISSION - ENCRYPTS/ DECRYPTS 64 BIT DATA WORDS USING 56 BIT KEY WORD - SINGLE PORT 28 PIN PACKAGE WD2001 OR DUAL PORT 40 PIN PACKAGE WD2002 - MAND BIT PROGRAMMING VIA DAL BUS OR INPUT PINS - DMA PATIBLE (SEE WESTERN DIGITAL DM1883) - PARITY CHECK ON KEY WORD LOADING - STANDARD 8 BIT MICROPROCESSOR INTER- GENERAL DESCRIPTION The Western Digital WD2001 and WD2002 Data FACE - INPUTS AND OUTPUTS TTL PATIBLE - KEY STORED ON CHIP IS NOT EXTERNALLY ACCESSIBLE - SEPARATE CLEAR AND CIPHER BUS STRUCTURE ON WD2002 Encryption / Decryption devices are designed to encrypt and decrypt 54-bit blocks of data using the algorithm specified in the Federal Information Processing Data Encryption Standard (#46). These devices encrypt a 64-Bit clear text word using a 56-Bit user-specified key to produce a 64-Bit cipher text word. When...