Certificate-based proxy decryption systems with revocability in the standard model

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• 作者：Lihua Wang ; Jun Shao ; Zhenfu Cao ; Masahiro Mambo ; Akihiro Yamamura ; Licheng Wang
• 关键词：Proxy cryptosystem (proxy decryption system) ; Pairing ; Certificate-based encryption (CBE)
• 刊名：Information Sciences
• 出版年：2013
• 出版时间：20 October, 2013
• 年：2013
• 卷：247
• 期：Complete
• 页码：188-201
• 全文大小：432 K

文摘

We present the concept of a certificate-based proxy decryption (CBPd) system with revocability, which has the following properties: (1) key-escrow freeness; (2) implicit certification; (3) revocability without public key change; and (4) fine-grained delegation. A concrete CBPd scheme is also proposed. The scheme is semantically secure against adaptive chosen plaintext attack (IND-CBPd-Rev-CPA) under the decisional bilinear Diffie-Hellman assumption in the standard model. We also give an enhanced scheme that is secure against adaptive chosen ciphertext attacks (IND-CBPd-Rev-CCA) in the standard model.