G - Physics – 06 – K
Patent
G - Physics
06
K
G06K 19/06 (2006.01) G06F 21/00 (2006.01) G07C 9/00 (2006.01) G07F 7/10 (2006.01)
Patent
CA 2094026
A method and apparatus for providing improved security for a personal identification number (PIN) in a personal ident- ification and verification system of the type wherein a time de- pendent nonpredictable code is generated at a device in the pos- session of the individual (36), which code is unique to the indi- vidual and this code is communicated to, and compared with a nonpredictable code generated at a central verification compu- ter (46). In this system, the PIN is mixed with the nonpredic- table code before transmission of these values to the central ver- ification computer (38). A nonsecret code (30) is previously transmitted to the central verification computer and is used by the verification computer to retrieve the PIN and independently generate the time dependent appropriate nonpredictable code for the user (74). These retrieved PIN and generated code va- lues are used by the verification computer either (a) to strip the PIN from the transmitted nonpredictable code (42) and the stripped PIN and remaining nonpredictable code are compared with the corresponding retrieved values in order to determine verification (44, 46); or (b) to be mixed and then compared with the mixed PIN and code which is transmitted to the verification computer (144).
Emc Corporation
Riches Mckenzie & Herbert Llp
LandOfFree
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