G - Physics
06
F
354/40
G06F 7/04 (2006.01) G06K 5/00 (2006.01) G07F 7/08 (2006.01) G07F 7/12 (2006.01) G07F 19/00 (2006.01)
Patent
CA 1049656
Abstract Methods and equipment for token control are known in which performance of an operation in response to presentation of a credit-card or like token is con- ditioned by information which is read from a recording borne by the token, the recorded information relating to the extent of previous use of the token within one of a succession of periods of time throughout each of which the token is authorized for limited use, and in which the recorded information is up-dated on the token in dependence upon the operation performed and the result of comparison between a date read from the token- recording and the current date. Previously the token- recorded date defines the period of last use of the token. According to this invention this date is instead taken to define the commencement of the authorized-use period which is next to commence following the last use of the token, and the record of this date is up-dated on the token (for example in accordance with other token- recorded data) when the result of the date comparison signifies that the next period-commencement is not later than the current date. This has the advantage of enabling a greater flexibility of allocation of credit- or other use- authorization from one user to another.
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