Method and apparatus for card authentication using display of symbols for identification of a personal code word
AssigneeGAO Gesellschaft fur Automation und Organisation mbH
InventorHelmut Grottrup
Life of this patent
Estimating the term…
Abstract
Methods and apparatus are provided through which, after insertion of a card into a card reader, a code word is presented which is made up of a certain number of signs or symbols. The user uses a pushbutton or other control to make selections of signs associated with the code word. If the correct signs are selected, an output is developed for control of an appropriate control function. The signs may be presented serially, in parallel or with a combination of serial and parallel presentations. Various means may be used for presentation of the code word and signs.
Claims21
In a method of veryifying use by an authorized person of a card having readable code information thereon, the steps of supplying for use by an authorized user of a card a personal code word in the form of a set of symbols which corresponds to said readable code information, presenting to a user of a card a plurality of symbols including symbols forming said code word and additional symbols which do not correspond to said code word, said symbols being so presented as to allow only an authorized person with knowledge of said code word to identify those forming said code word, measuring responses of a user to the presentation of said symbols, and comparing said user responses with code information from the presented card to indicate correct responses by the user to said symbols which form said code word.
In apparatus for verifying use by an authorized person of a card having readable code information thereon, symbol presentation means for presenting symbols to a user, said symbols including a set of symbols which form a personal code word supplied to an authorized user and which corresponds to said code information and additional symbols which do not form said personal code word, response means for operation by a user to develop response signals measuring his response to symbols presented by said presentation means, and comparator means for comparing said response signals with code information obtained from a card presented by the user.
Dependencies are inferred from the claim text.