Apparatus and method for securely realizing cooperative...

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique

Reexamination Certificate

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C713S156000, C713S181000

Reexamination Certificate

active

10653191

ABSTRACT:
A device for facilitating verification of an electronic signature in an exchange of instructions between an in-house server and an outside server. Each server which is to execute a partial process of a cooperative service has, in a key storage unit (206), secret keys corresponding to public key certificates issued by an in-house CA and by an outside public CA. A signature key selection unit216judges whether a server which is to execute a process next is a device within or outside the company and selects an in-house secret key when the next server is an in-house device and an outside secret key when the next server is an outside device. A signature creation unit (218) calculates a value of an electronic signature for an job flow instruction to the next server using the selected secret key. An instruction division/integration unit (204) transmits to the next server the job flow instruction with the electronic signature value attached.

REFERENCES:
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patent: 6772341 (2004-08-01), Shrader et al.
patent: 2002/0138577 (2002-09-01), Teng et al.
patent: A 8-123744 (1996-05-01), None
patent: A 2001-282970 (2001-10-01), None
patent: A 2002-99686 (2002-04-01), None
patent: A 2002-164884 (2002-06-01), None
Kaliski B., PKCS #7: Cryptographic Message Syntax Version 1.5, Mar. 1998, Network Working Group, Request for Comments: 2315.

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