发明名称 |
Method and system for recovering and validating 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 |
EP1243999(A2) |
申请公布日期 |
2002.09.25 |
申请号 |
EP20010109952 |
申请日期 |
2001.04.24 |
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 |
G06F21/64;G09C1/00;G06F21/00;H04L9/32;(IPC1-7):G06F1/00 |
主分类号 |
G06F21/64 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|