Patent ReferencesCryptographic apparatus and method Exponentiation cryptographic apparatus and method Method for certifying the origin of at least one item of information stored in the memory of a first electronic device and transmitted to a second electronic device, and system for carrying out the method Method and apparatus for protecting stored and transmitted data from compromise or interception On-line and off-line transaction security system using a code generated from a transaction parameter and a random number Electronic funds transfer system with means for verifying a personal identification number without pre-established secret keys Method and system for personal identification using proofs of legitimacy Databaseless security system Method for generating random number for the encoded transmission of data Method for testing a terminal communicating with chip cards Patent #: 5208447 InventorAssigneeApplicationNo. 773602 filed on 09/22/1992ExaminersPrimary: Chan, Eddie P.Attorney, Agent or FirmInternational ClassesG06F 012/14G06F 007/58 H04K 001/02 Foreign Application Priority Data1990-03-20 DEAbstractIn a process for authenticating a user using a data station (16) in relation to a computer system (14) connected to the data station (16), a first value z is determined in the computer system (14) from an identification word (u) stored for the user in the computer system and a random number r generated in the computer system, and a second value y is determined in the computer system (14) from the password a given by the user and the random number r. The password a is encoded before being sent to the computer system (14) and coded there by a one-way function (30). As a result of these measures, the password a does not appear in the clear text at any point in the data transmission.Other References
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