Data security system for transmitting and receiving data between

Details Data security system for transmitting and receiving data between Data security system for transmitting and receiving data between

1995-10-10

1999-08-03

Chan, Eddie P.

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

380 30, 380 4, 711115, G06F 1214, H04L 930

Patent

active

059338547

ABSTRACT:
In a system wherein a memory card is connected to a computer, data stored in a memory device in the memory card is read by a processor provided in the computer. An address signal and a data signal from the computer to the memory card, and/or a data signal from the memory card to the computer are coded with coding keys by a coder, while the coded signal is decoded by a decoder with a decoding key corresponding to the coding keys. The coder and the decoder adopts a public key system, and it is difficult to determine the decoding key even if the coding keys are known. In modified examples, coding keys are not provided beforehand in the computer or memory card, and they are latched in a latch device when the memory card is connected to the computer. When the coding keys and decoding keys are stored in the memory card, they are changed for each memory card.

REFERENCES:
patent: 4910774 (1990-03-01), Barakat
patent: 5202922 (1993-04-01), Iijima
patent: 5311595 (1994-05-01), Bjerrum et al.
patent: 5381478 (1995-01-01), Iijima
patent: 5428685 (1995-06-01), Kadooka et al.
patent: 5623637 (1997-04-01), Jones et al.
Philip Zimmermann, "Pretty Good Privacy Public Key Encryption for the Masses", Oct. 11, 1994, Ver 2.6.2, Phil's Pretty Good Software, pgpdocLand pgdoc2.

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