Programmable cryptic device for enciphering and deciphering...

Details Programmable cryptic device for enciphering and deciphering... Programmable cryptic device for enciphering and deciphering...

H - Electricity

04

L

340/70

H04L 9/00 (2006.01) G07F 7/12 (2006.01) H04L 9/18 (2006.01)

Patent

CA 1047407

Title of the Invention A PROGRAMMABLE CRYPTIC DEVICE FOR ENCIPHERING AND DECIPHERING DATA Abstract of the Disclosure An encrypter for encoding and decoding data, wherein clear text data to be encoded is logically combined with a portion of a non-linear pseudo-random bit sequence signal to provide a partially encoded signal. The bit se- quence of the non-linear pseudo-random signal is chosen in accordance with a user selected key. A shuffle register receives the partially encoded signal and interchanges the positions of the bits making up the partially encoded sig- nal in accordance with a user selected key to provide the fully encoded signal. The fully encoded signal may then be recorded, for example, on the magnetic stripe of a credit card. Means are provided for decoding the above de- scribed encoded signal using the same portion of the non- linear pseudo-random bit sequence that was used for en- coding.

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