发明名称 Method and system for recovering the validity of cryptographically signed digital data
摘要 <p>According to the present invention, techniques, including a method and system, for restoring and/or validating data and/or associated signature log entries are provided. One embodiment of the present invention provides a method for validating a restored message, having an entry generated in a signature log for a message, where the entry includes cryptographic information associated with the message; Next, when message is lost, the restored message is generated responsive to a request; and the restored message is validated using the signature log. In another embodiment a method for validating a selected log entry by using a signature log having a plurality of recorded log entries is provided. The method includes: computing a cryptographic value for the selected log entry; and determining if the cryptographic value is part of another recorded log entry.</p>
申请公布号 SG120979(A1) 申请公布日期 2006.04.26
申请号 SG20040002019 申请日期 2001.04.27
申请人 HITACHI, LTD. 发明人 MIYAZAKI KUNIHIKO;YOSHIURA HIROSHI;SUSAKI SEIICHI;SASAKI RYOICHI;TAKARAGI KAZUO;TOYOSHIMA HISASHI;MATSUKI TAKESHI
分类号 G09C1/00;G06F21/00;H04L9/32;(IPC1-7):H04L9/32 主分类号 G09C1/00
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