Identity-Based Encryption Algorithm Based on CPK
Nan Li · Jisuanji gongcheng · 2010
In order to improve the security of Identity-Based Encryption(IBE) algorithm,this paper designs IBE algorithm based on Combined Public Key(CPK).It produces user public key according to the method of user key producing in CPK,realizes the map from identity to the group of points on an elliptic curve simply,replaces single system master key with system master key matrix,and expands the space of system master key and reduces the risk that the system is destroyed for the leak of the single system master key.Theory analysis results show that this algorithm has the characteristics of large scale key management,simple public key authentication,and it does not have the collusion attack.