IC card with a cipher key conversion function

Details IC card with a cipher key conversion function IC card with a cipher key conversion function

2008-07-29

2008-07-29

Caputo, Lisa M (Department: 2876)

Registers

Records

Conductive

C235S487000

Reexamination Certificate

active

10834245

ABSTRACT:
Information recorded by an application provider in an IC card can be referred to, read out or changed by another application provider. The IC card has a plurality of cipher keys for reading out or writing the information recorded in the IC card, and provides a cipher key conversion function for encryption with a file capable of being managed, read out or written by the application provider himself using the cipher key. By the cipher key conversion function, data can be read out or written from or in the file of the other application provider.

REFERENCES:
patent: 5381478 (1995-01-01), Iijima
patent: 5745571 (1998-04-01), Zuk
patent: 6073236 (2000-06-01), Kusakabe et al.
patent: 6408390 (2002-06-01), Saito
patent: 1180865 (1998-05-01), None
patent: 19925389 (2000-12-01), None
patent: 1 111 557 (2001-06-01), None
patent: 1 117 064 (2001-07-01), None
patent: A-2001-167241 (2001-06-01), None

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