Digital signing method, digital signing apparatus, portable...

Details Digital signing method, digital signing apparatus, portable... Digital signing method, digital signing apparatus, portable...

2005-08-02

2010-12-28

Zand, Kambiz (Department: 2434)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C709S225000

Reexamination Certificate

active

07861086

ABSTRACT:
A digital signing method in a digital signing apparatus that provides a digital signature to electronic data, including: inputting data to be signed with the digital signature; presenting attribute information of one or more signature keys; displaying said attribute information of said one or more signature keys presented to a user; creating signature data by using said inputted data and a signature key corresponding to said attribute information of signature key selected by said user from said attribute information of said one or more signature keys displayed; and saving signature data created or a signature file created based on said signature data in a storage unit.

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Mihir Bellare; A Forward-Secure Digital Signature Scheme; Year:1999; Springer Berlin / Heidelberg; vol. 1666/1999; p. 786.
Office Action for coresponding Japanese Patent Application No. 2004-227909, issued on Aug. 31, 2010.

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