发明名称 Paper-based document logging
摘要 A method and apparatus are disclosed herein for paper-based document logging. In one embodiment, the method comprises scanning bits of a document, generating a cryptographic hash, converting the cryptographic hash into a machine readable code, and rewriting the document with the code contained thereon.
申请公布号 US2008059800(A1) 申请公布日期 2008.03.06
申请号 US20060514711 申请日期 2006.08.31
申请人 RICOH CO., LTD. 发明人 PIERSOL KURT W.
分类号 H04L9/00 主分类号 H04L9/00
代理机构 代理人
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