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Dianzi Ke-ji Daxue xuebao

An Improved Secure Two-Party Bargaining Protocol

Qin Zhi-guang

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

In this paper a secure two-party bargaining protocol is proposed which is based on Pallier homomorphic public key cryptosystem. The participant can make a bargain with another one by implementing the protocol. During the protocol, the privacy of input and the correctness of output should be preserved. The third party will participate in working out the final price only under the condition of success agreement. Through the analysis of complexity and security, this protocol holds higher implementing efficiency and security characters, and therefore has application value in the e-commerce.

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In this paper a secure two-party bargaining protocol is proposed which is based on Pallier homomorphic public key cryptosystem. The participant can make a bargain with another one by implementing the protocol. During the protocol, the privacy of input and the correctness of output should be preserved. The third party will participate in working out the final price only under the condition of success agreement. Through the analysis of complexity and security, this protocol holds higher implementing efficiency and security characters, and therefore has application value in the e-commerce.
A secure two-party bargaining protocol is proposed which is based on Pallier homomorphic public key cryptosystem.The agreement offered the privacy of information and the right of the results.After the success of bargaining,it prevents one party from tampering with the agreement and thus to deceive the other party.The agreement does not require third-party.The final price can be calculated by the parties of bargaining.The analysis of complexity and security shows that the efficiency and security features of the agreement is higher.
Secure multi-party computation with its applications is an important direction in current cryptography research field. The research focuses on how to accomplish the secure cooperative computation among multi-party without the participation of the third party. The two-party bargaining protocol, based on homomorphic public key cryptosystem, was an example of secure multi-party computation's applications. One participant can make a bargain with the other by implementing the protocol. During the implementation of protocol, the privacy of input and the correctness of output could be preserved. The protocol can be implemented without the participation of the third party and its security was based on additive homomorphic public key cryptosystem.
At present, research on secure multi-party computation is of great interest in modern cryptography. It should be acknowledged that if any function can be computed securely, then it results in a very powerful tool. In fact, all natural protocols are, or can be rephrased to be, special cases of the multi-party computation problems. Design and analysis of the special multi-party computation protocols is meaningful and has attracted much interest in this field. Based on the combination of a public-key cryptosystem of the homomorphic encryption and on the theoretic construction relying on the F-hiding assumption, a protocol for comparing information of equality is proposed. The protocol needs only a single round of interaction and ensures fairness, efficiency and security. The protocol is fair, which means that one party knows the sound result of the comparison if and only if the other one knows the result. The protocol is efficient with the help of an oblivious third party for calculating. However, the third party cannot learn any information about the participant抯 private inputs and even about the comparison result, and cannot collude with any participant. The protocol is secure for the two participants, that is, any information about their secret input will not leak except the final computation result. A precise proof of security of the protocol is presented. Applications of this protocol may include private bidding and auctions, secret ballot elections, commercial business, identification in a number of scenarios and so on. It is believed that the protocol may be of practical significance for electronic transaction.
Secure scalar product protocol is an important fundamental protocol in secure multi-party computation. Serving as a basic building block for many other secure protocols, it is widely used in data mining, statistical analysis and scientific computation. Based on additive homomorphism public key cryptosystem, we develop a new secure scalar product protocol under semi-honest model with low communication complexity which is easy to implement and understanding. Furthermore, we firstly apply it to position relationship decision for privacy preserving space vectors.
This paper analyzed the common key agreement protocol. Based on the homomorphic encryption mechanism and NTRU Public Key Cryptosystem,the authenticated homomorphism key agreement protocol based on NTRU Public Key Cryptosystem was presented. The session key created by the that protocol was authenticated,contributory and forward secrecy. Compared with the key agreement protocol based on the other public key cryptosystem,it has better security and efficiency. The improved BAN logic was used to analyze the protocol formally,and the security of the protocol was proved.
Authenticated key agreement protocol is the fundamental building block for secure communication in the open network to ensure authentication and confidentiality of e-commerce and e-government applications. Certificateless public key cryptography combines the advantage of the identity-based public key cryptography (ID-PKC) and the traditional PKI. In this paper, we present a secure and efficient two-party authenticated key agreement protocol based on an efficient and secure certificateless public key encryption scheme. It achieves almost all the known security attributes for authenticated key agreement protocol, such as perfect forward secrecy, PKG forward secrecy, key-compromise impersonation resilience, unknown key-share resilience, message independence and no key control. Compared to other comparable schemes, it is more secure and has nice efficiency.