发明名称 Digital measurement apparatus and image measurement apparatus
摘要 A digital measurement apparatus measures a physical measurement object, provides a digital signature of public-key cryptography to measured data of a thus-measured physical quantity, and manages the measured data. The apparatus generates at least a pair of a public key and a private key, to be used for the digital signature of the public-key cryptography, through a key generating algorithm.
申请公布号 US6889324(B1) 申请公布日期 2005.05.03
申请号 US19990442056 申请日期 1999.11.16
申请人 RICOH COMPANY, LTD. 发明人 KANAI YOICHI;YACHIDA MASUYOSHI
分类号 G09C1/00;G08C19/00;H04L9/00;H04L9/08;H04L9/32;H04N1/387;H04N1/44;(IPC1-7):H04L9/32 主分类号 G09C1/00
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