Server generating basic signature data using signing target data, electronic signature value and timestamp

Patent metadata

Field	Value
Publication number	US-9628281-B2
Application number	US-201414340437-A
Country	US
Kind code	B2
Filing date	Jul 24, 2014
Priority date	Nov 13, 2009
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A long-term signature verification server receives long-term signature data configured using signing target data, verification information for verifying the signing target data, and long-term verification information for verifying the authenticity of original data from a verifier terminal. The server verifies the signing target data and the verification information for a predetermined period of time, forms long-term verification information forming information by extracting predetermined information included in the long-term signature data, and transmits the long-term verification information forming information to the verifier terminal. The server receives from the verifier terminal a long-term verification information forming function value calculated using a predetermined function by adding the original data to the transmitted long-term verification information forming information, and verifies the long-term verification information using the received long-term verification information forming function value.

First claim

The invention claimed is:

1. A long-term signature verification server comprising:
long-term signature data reception means for receiving long-term signature data configured using signing target data, verification information for verifying the signing target data, and long-term verification information for verifying the authenticity of original data from a verifier terminal, the long-term verification information including long-term verification information for verifying the signing target data and the verification information for a predetermined period of time;
long-term verification information forming information transmission means for forming long-term verification information forming information by extracting predetermined information included in the long-term signature data and for transmitting the long-term verification information forming information which has been formed to the verifier terminal;
long-term verification information forming function value receiving means for receiving from the verifier terminal a long-term verification information forming function value calculated using a predetermined function by adding the original data to the transmitted long-term verification information forming information; and
long-term verification information verification means for verifying the long-term verification information using the received long-term verification information forming function value;
wherein the verification information for verifying the signing target data includes a group of certificates configured by a public key certificate of a private key that is contained in the verifier terminal along with the original data; and
wherein the long-term signature server forms and verifies the long-term verification information while the original data and the private key are held in the verifier terminal.

2. The long-term signature verification server according to claim 1 , further comprising:
signing target data verification means for verifying the signing target data using the verification information,
wherein the long-term verification information verification means verifies the long-term verification information after the verification by the signing target data verification means.

Assignees

• Seiko Instr Inc

Inventors

• Murao Shinichi
• Uehata Masakazu
• Shibata Koichi

Classifications

• H04L2209/68

  Special signature format, e.g. XML format · CPC title

• H04L9/3263

  involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements (network architectures or network communication protocols for supporting authentication of entities using certificates in a packet data network H04L63/0823) · CPC title

• H04L9/3268

  using certificate validation, registration, distribution or revocation, e.g. certificate revocation list [CRL] · CPC title

• H04L9/3297

  involving time stamps, e.g. generation of time stamps · CPC title

• H04L9/3236

  using cryptographic hash functions · CPC title