Title: Card data recognizing system
Application Number: 99102326 Application Date: 1999.02.13
Publication Number: 1229962 Publication Date: 1999.09.29
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G06K19/07
Applicant(s) Name: Matsushita Electric Industrial Co., Ltd. Address:
Inventor(s) Name: Makoto Takebayashi
Attorney & Agent: wang yong
Abstract:
    The invention provides a card data authentication system whereby any of a plurality of data terminal devices reads and authenticates card data written on an IC card by any of the plurality of data terminal devices. A management center generates a signature key and a verification key that are unique to each of the plurality of data terminal devices according to a digital signature scheme with a public-key cryptosystem and sends generated signature keys respectively to the plurality of data terminal devices. A data writing terminal device generates digital signature data for plaintext data using a signature key sent from the management center and writes the digital signature data on the IC card. A data reading terminal device reads the digital signature data from the IC card and authenticates the card data using the read digital signature data and a verification key corresponding to the signature key used by the data writing terminal device.
Time: 10
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