Matrix Access structure Policy used in Attribute-Based Proxy Re-encryption
Proxy re-encryption (PRE) allows a semi-trusted proxy to convert a ciphertext originally intended for Alice into an encryption of the same message intended for Bob. Song Luo, Jianbin Hu, and Zhong Chen presented a novel ciphertext policy attribute-based proxy re-encryption (CP-AB-PRE) scheme. The ciphertext policy realized in their scheme is AND-gates policy supporting multi-value attributes, negative attributes and wildcards. We propose a new access policies based on LSSS matrix access structures. Our scheme still have the properties of PRE and CP-AB-PRE, such as unidirectionality, non-interactivity, multi-use, allows the encryptor to decide whether the ciphertext can be re-encrypted and allows the proxy to add access policy. Furthermore, our scheme can be modified to outsource the policy of W2.
Keywords: Proxy Re-encryption, Attribute-Based Encryption, Ciphertext Policy, matrix access structures
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ABOUT THE AUTHOR
Li Keying
Li Keying received a bachelor¡¯s degree from Linyi University, Shandong, China, in 2011. He is now pursuing Master of Faculty of science, Xidian University, Xi\'an, China. His research interests cover the attributes based encryption, outsourcing, cloud computation, lossy trapdoor function, lossy encryption, and secret sharing.
Li Keying
Li Keying received a bachelor¡¯s degree from Linyi University, Shandong, China, in 2011. He is now pursuing Master of Faculty of science, Xidian University, Xi\'an, China. His research interests cover the attributes based encryption, outsourcing, cloud computation, lossy trapdoor function, lossy encryption, and secret sharing.
