Research On Attribute Based Cryptographic Algorithms

Network technology and the growing application needs promote the developmentof the social informatization, and the information society provides a lot of convenienceto the human society, but also exposed many security risks.With the developing of cryptography, attribute-based cryptographic algorithmresearch has received widespread attention in recent years. It is an efficient way toprovide data confidentiality and expressive control at the same time. Moreover,attribute-based encryption can be viewed as broadcast encryption deformation, whichallows one ciphertext to be decrypted by several users who satisfy the access controlpolicy, and also permits one user to decrypt several ciphertexts labeled with differentattribute sets.This paper is dedicated to the study of attribute-based cryptographic algorithm,through the analysis of the typical the attribute-based encryption scheme (ABE), andpoints out that the mutual relationship and research focus of this kind of schemes. Weput forward three schemes as follows:1. We construct a symmetric-key encryption scheme in cloud computing, realizingthe privacy of the inquiries and data confidentiality. Also, the security proof is given.2. We propose an access control method based on predicate encryption in cloudcomputing, and it effectively solves the problems of data security and access control.We also give a security analysis.3. We propose a strongly secure attribute-based authenticated key exchange withtraceability, whose security proof is under the gap bilinear Diffie-Hellman assumptionin the attribute-based eCK model. We also use group signature to achieve traceability ofthe user.