发明授权
- 专利标题： Method and apparatus for secure document timestamping
- 专利标题（中）： 用于安全文档时间戳的方法和装置
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申请号： US09149024申请日： 1998-09-08
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公开(公告)号： US06263438B1公开(公告)日： 2001-07-17
- 发明人: Jay S. Walker , Bruce Schneier , James A. Jorasch
- 申请人： Jay S. Walker , Bruce Schneier , James A. Jorasch
- 主分类号： G06F126
- IPC分类号： G06F126
摘要：
The invention relates devices and methods for creating a cryptographically assured timestamp that can be verified by a party that was not present during the creation of the timestamp. The timestamp is applied to physical documents, and other substrates capable of receiving an optically detectable mark, that are to be transmitted to temporally or spatially distant recipients.
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