首页> 外国专利> VALIDITY TERM EXTENSION SYSTEM FOR DIGITAL SIGNATURE, VALIDITY TERM EXTENDING DEVICE FOR THE SAME, VERIFYING METHOD FOR THE SAME AND VALIDITY TERM EXTENDING METHOD FOR THE SAME

VALIDITY TERM EXTENSION SYSTEM FOR DIGITAL SIGNATURE, VALIDITY TERM EXTENDING DEVICE FOR THE SAME, VERIFYING METHOD FOR THE SAME AND VALIDITY TERM EXTENDING METHOD FOR THE SAME

机译:用于数字签名的有效期扩展系统,用于同一目的的有效期扩展设备,用于同一目的的验证方法以及用于同一目的的有效期扩展方法

摘要

PROBLEM TO BE SOLVED: To enable a person different from an original signatory to perform the extending of the validity term of an original digital signature.;SOLUTION: The validity term extending device 4 for a digital signature transmits an original digital signature 42 to a time stamp issuing server 10 within the validity term and the time stamp issuing server 10 combines time information 43 concerning a time when the original digital signature 42 is received with the signature to generate a digital signature as a time stamp 45. The device 4 successively repeats an operation that a new digital signature having the new validity term is generated by combining the digital signature 42 with the time stamp 45 and the new digital signature is transmitted to the time stamp server 10 within the new validity term.;COPYRIGHT: (C)2001,JPO
机译:解决的问题:为了使不同于原始签名人的人能够执行原始数字签名的有效期的扩展;解决方案:用于数字签名的有效期限扩展装置4将原始数字签名42发送给某个时间。在有效期内的时间戳发行服务器10和时间戳发行服务器10将与接收到原始数字签名42的时间有关的时间信息43与签名组合在一起,以生成数字签名作为时间戳45。设备4连续地重复操作:通过将数字签名42与时间戳45相结合来生成具有新的有效期限的新数字签名,并且在新的有效期限内将新的数字签名传输到时间戳服务器10。版权所有:(C)2001 ,日本特许厅

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