Traceable Scheme of Public Key Encryption with Equality Test

【Author】 Zhu, Huijun; Xue, Qingji; Li, Tianfeng; Xie, Dong

【Source】ENTROPY

【影响因子】2.738

【Abstract】Public key encryption supporting equality test (PKEwET) schemes, because of their special function, have good applications in many fields, such as in cloud computing services, blockchain, and the Internet of Things. The original PKEwET has no authorization function. Subsequently, many PKEwET schemes have been proposed with the ability to perform authorization against various application scenarios. However, these schemes are incapable of traceability to the ciphertexts. In this paper, the ability of tracing to the ciphertexts is introduced into a PKEwET scheme. For the ciphertexts, the presented scheme supports not only the equality test, but also has the function of traceability. Meanwhile, the security of the proposed scheme is revealed by a game between an adversary and a simulator, and it achieves a desirable level of security. Depending on the attacker's privileges, it can resist OW-CCA security against an adversary with a trapdoor, and can resist IND-CCA security against an adversary without a trapdoor. Finally, the performance of the presented scheme is discussed.

【Keywords】public key encryption; equality test; blockchain; cloud server

【发表时间】2022 MAR

【收录时间】2022-04-12

【文献类型】期刊

【主题类别】

区块链技术-密码学-