公开(公告)号：DE68926670D1

公开(公告)日：1996-07-18

申请号：DE68926670

申请日：1989-01-03

Applicant: MOTOROLA INC

Inventor： DABBISH EZZAT ,  BYRNS JOHN ,  MCCLAUGHRY MICHAEL ,  PUHL LARRY ,  BROWN DANIEL ,  ZIOLKO ERIC ,  BRIGHT MICHAEL

IPC: H04L9/10 ,  G06F21/00 ,  H04K1/00 ,  H04L9/06 ,  H04L9/14

Abstract: A cryptographic apparatus for encrypting and decrypting digital words includes a mechanism that permits a cipher algorithm to be electronically stored after the manufacture of the apparatus. The storing mechanism includes at least one electrically erasable, programmable gate array containing a portion of the cipher algorithm and at least one random access memory device coupled to the array for storing digital data generated by the algorithm. A mechanism which is coupled to the gate array and memory device controls the execution of the algorithm for each digital word thereby decrypting encrypted digital words and encrypting non-encrypted digital words.

公开(公告)号：DE68926670T2

公开(公告)日：1996-12-19

申请号：DE68926670

申请日：1989-01-03

Applicant: MOTOROLA INC

Inventor： DABBISH EZZAT ,  BYRNS JOHN ,  MCCLAUGHRY MICHAEL ,  PUHL LARRY ,  BROWN DANIEL ,  ZIOLKO ERIC ,  BRIGHT MICHAEL

IPC: H04L9/10 ,  G06F21/00 ,  H04K1/00 ,  H04L9/06 ,  H04L9/14

Abstract: A cryptographic apparatus for encrypting and decrypting digital words includes a mechanism that permits a cipher algorithm to be electronically stored after the manufacture of the apparatus. The storing mechanism includes at least one electrically erasable, programmable gate array containing a portion of the cipher algorithm and at least one random access memory device coupled to the array for storing digital data generated by the algorithm. A mechanism which is coupled to the gate array and memory device controls the execution of the algorithm for each digital word thereby decrypting encrypted digital words and encrypting non-encrypted digital words.