发明名称 |
Document authentication and verification |
摘要 |
A technique of encoding a document to prevent undetected alteration of the document includes identifying symbols to be changed by applying font changes to the identified symbols and generating font change pointers that track changes applied to the identified symbols. Techniques to decode and detect changes are also described. |
申请公布号 |
US2003145206(A1) |
申请公布日期 |
2003.07.31 |
申请号 |
US20020057297 |
申请日期 |
2002.01.25 |
申请人 |
WOLOSEWICZ JACK;SCHMIDT ANDREAS |
发明人 |
WOLOSEWICZ JACK;SCHMIDT ANDREAS |
分类号 |
G06F21/00;H04L9/32;(IPC1-7):H04L9/00 |
主分类号 |
G06F21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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