Prozy Re-encryption Scheme Based on BB2 Identity Based Encryption
In 1998, Blaze, Bleumer, and Strauss proposed a kind of cryptographic primitive called proxy re-encryption. In proxy re-encryption, a proxy can transform a ciphertext computed under Alice’s public key into one that can be opened under Bob’s decryption key. They predicated that proxy reencryption and re-signature will play an important role in our life. In 2007, Matsuo proposed the concept of four types of reencryption schemes: CBE to IBE(type 1), IBE to IBE(type 2), IBE to CBE (type 3), CBE to CBE (type 4). Now CBE to IBE and IBE to IBE proxy re-encryption schemes are being standardized by IEEEP1363.3 working group. One feature of proxy re-encryption schemes proposed by Matsuo is that they are all based on BB1 identity based encryption.We ask question like this: can we construct proxy re-encryption schemes based on BB2 identity based encryption? We give affirmative answer to this question. We construct an IBE to IBE proxy re-encryption scheme based on BB2 with the help of PKG and prove its security in the standard model.
Xiaoyuan Yang Xu an Wang
Key Laboratory of Information and Network Security Engneering College of Chinese Armed Police Force, 710086, P. R. China
国际会议
北京
英文
134-137
2009-08-08（万方平台首次上网日期，不代表论文的发表时间）