Enhancement of confidentiality of executors’inputs in Zhong-Yang protocol

Abstract

In order to prevent the fault wire-key probing attacks from the malicious mobile code generators for enhancing the confidentiality of executors’inputs in Zhong-Yang protocol,a verifiable multiplying subsidiary circuit is proposed and used to extend the garbled circuit in Zhong-Yang protocol.The extended protocol replaces executors’input-wires with the multiplying subsidiary circuits for resisting fault wire-key probing attacks,and ensures the correctness of the construction of the subsidiary circuit by the committed garbled circuit technology of Jarecki and Shmatikov and the third-party challenged zero-knowledge proof protocols.The analyses show that,when more than two-thirds of the third-party servers are honest,the extended protocol can prevent the tampering wire-key attacks of the malicious third-party servers and the fault wire-key probing attacks of the malicious generators simultaneously,meet the non-interactive request of mobile code environment,and add polynomial communication and computation complexity.The extended protocol ensures the complete confidentiality of executors’inputs in malicious mobile code environment.