|
|
|
| A Multi-service Oriented Traitor Tracing Scheme on LIFP |
| Zhang Xue-jun①; Yu Guo-lin②; Zhou Li-hua① |
| ①Ministry of Edu. Key Lab. of Computer Network and Info. Security, Xidian Univ., Xi’an 710071, China;②The Second Northwest Institute Ethnic Minority, Yinchuan 750021, China |
|
|
|
|
Abstract A multi-service traitor tracing scheme on LIFP(Large Integer Factoring Problem) is proposed，the essential idea of which is that an equation based on LIFP is constructed and a parameter is introduced to transfer service private-key. In decryption procedure, the session key can be obtained by the equation and the service private-key. Compared with the existing two traitor tracing schemes, this scheme has many advantages such as multi-service, black-box traitor tracing, ciphertexts of constant size, adding or revoking users, forward-security and backward-security. Furthermore, its whole capabilities are better than that of the existing ones.
|
|
Received: 30 September 2005
|
|
|
|
|
|
|
|
|
2007, Vol. 29 
