发明名称 |
VERFAHREN ZUR ÜBERTRAGUNG DER BEFUGNIS, NACHRICHTEN ZU ENTSCHLÜSSELN |
摘要 |
Methods for transferring among key holders in encoding and cryptographic systems the right to decode and decrypt messages in a way that does not explicitly reveal decoding and decrypting keys used and the original messages. Such methods are more secure and more efficient than typical re-encoding and re-encryption schemes, and are useful in developing such applications as document distribution and long-term file protection. <IMAGE> |
申请公布号 |
AT397337(T) |
申请公布日期 |
2008.06.15 |
申请号 |
AT20000121783T |
申请日期 |
2000.10.05 |
申请人 |
CONTENTGUARD HOLDINGS, INC. |
发明人 |
WANG, XIN |
分类号 |
G09C1/00;H04L9/30 |
主分类号 |
G09C1/00 |
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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