Portable electronic authorization devices and methods therefor

Details Portable electronic authorization devices and methods therefor Portable electronic authorization devices and methods therefor

1996-12-04

1999-06-29

Cain, David

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 23, 380 30, 380 49, 235380, H04K 100

Patent

active

059179139

ABSTRACT:
A portable electronic authorization device for approving a transaction request originated from an electronic transaction system. The portable electronic authorization device includes first logic circuit configured to receive first digital data representative of the transaction request. There is further included second logic circuit configured to form second digital data responsive to the transaction request received by the first logic circuit if the transaction request is approved by a user of the portable electronic transaction device. The second digital data represents encrypted data signifying an approval by the user of the transaction request. Additionally, the portable electronic authorization device includes transmission circuitry coupled to the second logic circuit. The transmission circuitry is configured to transmit the second digital data from the portable electronic authorization apparatus to the electronic transaction system if the user approves the transaction request.

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Carol H. Fancher, "In your pocket smartcards," Electronic Payments, IEEE Spectrum, Feb. 1997, Motorola, Inc., pp. 47-53.

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