发明名称 |
Method for incremental authentication of documents |
摘要 |
A method of protecting an electronic document, the method comprising dividing an original document into data blocks; generating a corresponding hash value for each data block; generating a corresponding hash value for a group of data blocks (GOB); generating a hash tree structure based on the corresponding hash values for the data blocks and for the GOB; calculating a hash value of a root node of the hash tree structure, the root node having no parent in the hash tree structure; signing the hash value of the root node; and generating auxiliary authentication data; wherein said auxiliary authentication data enables authentication of portions of the electronic document based on a reconstruction of the hash tree structure.
|
申请公布号 |
US2005091261(A1) |
申请公布日期 |
2005.04.28 |
申请号 |
US20040957414 |
申请日期 |
2004.10.01 |
申请人 |
AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH |
发明人 |
WU YONG D.;DENG HUIJIE R. |
分类号 |
G06F21/00;(IPC1-7):G06F17/30 |
主分类号 |
G06F21/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|