Improving Security of Traceable White-Box CPABE with TTP Access Control

Various encryption schemes have gained popularity for secure transmission of data. CPABE (Ciphertext Policy Attribute Based Encryption) is one among such schemes. The decryption rights are generated based on the attributes of user. Traceability is the property by which the malicious users who intentionally try to leak the data are traced. However it is difficult to find the actual user who leaked the key since there can be many people who share the same decryption rights. In this paper a trusted third party is introduced, which will act as the public auditor. If any malicious user claims to be innocent, then the third party checks and traces all the information transferred by that user.