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Title:
ELECTRONIC SIGNATURE SYSTEM AND METHOD
Document Type and Number:
Japanese Patent JP2011024155
Kind Code:
A
Abstract:

To provide an electronic signature service capable of safely managing a secret key, and using a PC terminal without selecting it.

A PC terminal 1 transmits document identification information for identifying a document used as a signature object to a signature service provision server 3. The signature service provision server 3 generates a message digest of the document identified by the document identification information, and transmits the generated message digest to a mobile terminal 2. The mobile terminal 2 encrypts the message digest using a secret key to generate signature information, and transmits the generated signature information to the signature service provision server 3.


Inventors:
AOYANAGI MAKIKO
OKAMOTO MANABU
TAKAHASHI KENJI
Application Number:
JP2009169700A
Publication Date:
February 03, 2011
Filing Date:
July 21, 2009
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
H04L9/32; G06F21/31; G06F21/64
Domestic Patent References:
JP2004200740A2004-07-15
JP2005142661A2005-06-02
JP2007232754A2007-09-13
Attorney, Agent or Firm:
Naoki Nakao
Taku Kusano
Yukio Nakamura



 
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