发明名称 |
LONG-TERM SECURE DIGITAL SIGNATURES |
摘要 |
<p>A method for digitally signing of electronic documents which are to be kept secure for a very long time, thereby taking into account future cryptographic developments which could render currently cryptographic key-lengths insufficient. A double signature is issued for each document. A first digital signature ensures the long term security, while a second digital signature ensures the involvement of an individual user. Thereby, the second digital signature is less computationally intensive in its generation than the first digital signature.</p> |
申请公布号 |
EP1599965(B1) |
申请公布日期 |
2015.02.11 |
申请号 |
EP20040716669 |
申请日期 |
2004.03.03 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BUHLER, PETER;OSBORNE, MICHAEL;MAEDER, ROMAN;KURSAWE, KLAUS |
分类号 |
H04L9/32 |
主分类号 |
H04L9/32 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|