The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 2017
Filed:
May. 14, 2015
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Kenjiro Ike, Fukuoka, JP;
Saburo Toyonaga, Fukuoka, JP;
Hiroyuki Tanaka, Fukuoka, JP;
Masakatsu Matsuo, Fukuoka, JP;
Abstract
Provided is a signature verification system including a communication device and a verification device. The communication device and the verification device are connected to each other through a network. The communication device derives a first hash value from a first random number, derives a second hash value from data including electronic data and a certificate of the communication device which includes the first hash value and a public key of the communication device, using a unidirectional function, generates a signature using a secret key of the communication device with respect to the second hash value, and transmits the electronic data, the certificate, and the signature to the verification device. The verification device receives the electronic data, the certificate, and the signature, authenticates the communication device using the first hash value included in the certificate, derives the second hash value from the data including the electronic data and the certificate using a unidirectional function, and verifies the signature using the public key of the communication device and the derived second hash value which are included in the certificate.