Method and apparatus employing a dynamic encryption interface be

Details Method and apparatus employing a dynamic encryption interface be Method and apparatus employing a dynamic encryption interface be

1997-09-29

1999-11-16

Swann, Tod R.

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

711133, 711104, 711105, 711106, 713200, 380 3, 380 4, H04L 900

Patent

active

059875720

ABSTRACT:
A method and apparatus employing a dynamic encryption interface between a processor and a memory. The interface of the present invention dynamically encrypts the contents of the memory. A determination is made whether a memory access request is active. If yes, a further determination is made whether the address associated with the memory access request is greater than a POINTER. If yes, encrypting or decrypting the memory access using a first key. If no, encrypting or decrypting the memory access using a second key. Processing then proceeds to the decision block that determines whether or not the memory access request is active. If the memory access request is not active, data is read from a memory location identified by the POINTER. The read data is decrypted using the first key. The data is encrypted using the second key. The encrypted data is written back to the memory location point identified by the POINTER.

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