DATA PROCESSING METHOD, PROGRAM THEREOF, AND DEVICE THEREOF

Title:

DATA PROCESSING METHOD, PROGRAM THEREOF, AND DEVICE THEREOF

Document Type and Number:

WIPO Patent Application WO/2004/028080

Kind Code:

A1

Abstract:

By using inter-authentication key data correlated to a process allowed for a user card (73) among processes relating to SAM units (9a, 9b), degenerate key data is generated from which it is difficult to restore the inter-authentication key data. The degenerate key data and the key specification data specifying the inter-authentication key data used for its generation are written onto the user card (73).

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Inventors:

OMORI KAZUO (JP)
HONJO AKIRA (JP)
SUEYOSHI MASAHIRO (JP)
HANAKI NAOFUMI (JP)
TATENO KEI (JP)

Application Number:

PCT/JP2003/011803

Publication Date:

April 01, 2004

Filing Date:

September 17, 2003

Export Citation:

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Assignee:

SONY CORP (JP)
OMORI KAZUO (JP)
HONJO AKIRA (JP)
SUEYOSHI MASAHIRO (JP)
HANAKI NAOFUMI (JP)
TATENO KEI (JP)

International Classes:

G06F21/00; G07F7/10; H04L9/08; H04L9/32; (IPC1-7): H04L9/32; H04L9/08; G06F15/00

Foreign References:

JPH11163853A	1999-06-18
JPH09114946A	1997-05-02

Other References: