| 摘要 |
A computer-implemented method of generating a digital signature on a message M for a signer E t which is an entity t levels below an entity E 0 in a hierarchical system including at least the entities E 0 , E 1 ,..., E t , t ‰¥ 2, wherein each entity E i ( i =1,..., t ) is a child of entity E i -1 in the hierarchical system, the method comprising:
(1) obtaining the signer's secret key S t which is a member of a group G 1 ;
(2) obtaining the signer's integer secret s t ;
(3) generating a signature component Sig on the message M as a value Sig=S t + s t P M
wherein:
"+" is a group operation in the group G 1 ; and P M is a value depending on the message M and is a member of the group G 1 . |
