Due to the rapid development of the Internet, many applications of Internet are widely used. Therefore, the security issue of Internet has become an important issue. In this paper, we proposed an electronic public engineering project bidding protocol via subliminal channel can protect bidder's benefit. On the other hand, we offer an official agent to make a fair arbitration. Our scheme not only satisfies non-repudiation, untraceable and fair arbitration of the public engineering project, but also can resist replay attack, forgery attack and insider attack. Our scheme enhances security and fairness.DOI: http://dx.doi.org/10.5755/j01.itc.46.4.14163
Due to the rapid development of the Internet, many applications of Internet are widely used. Therefore, the security issue of Internet has become an important issue. In this paper, we proposed an electronic public engineering project bidding protocol via subliminal channel can protect bidder's benefit. On the other hand, we offer an official agent to make a fair arbitration. Our scheme not only satisfies non-repudiation, untraceable and fair arbitration of the public engineering project, but also can resist replay attack, forgery attack and insider attack. Our scheme enhances security and fairness.DOI: http://dx.doi.org/10.5755/j01.itc.46.4.14163
Customers are usually passive in an electronic commerce transaction. Based on a new two times concurrent signature, this article presents a fair electronic payment (E-payment) protocol. It can protect both of the participants' profits. Whatpsilas more, in this protocol customers have more initiative, and they can terminate the transaction before possible cheats (while they also should be responsible for the quit), so their security is enhanced. As there is no traditional trusted third party (TTP) in our scheme, network congestion and conspiracy problem can be avoided. Moreover, the protocol satisfies fairness and non-repudiation, and it can also be applied in the digital signature or product exchange process.
With the development of e-commence and other utilities on internet,a new security service——fair non-repudiation becomes more important and crucial.But,most current protocols depend on trusted third party(TTP),so a fair non-repudiation protocol without TTP is needed.But the existing fair protocols don't have equal security for message originator and receiver,and they can not assure the security of the message originator.In this paper,a new protocol is designed for the prior security of the originator,and a fair non-repudiation protocol without TTP based on entity's computing power is proposed to get rid of the dependence on TTP,to solve the security problems that exist when message originator and receiver's computing power are not equal.
Electronic contract signing is an important issue in electronic commerce,while fair electronic contract signing protocol is an application model of fair exchange protocol,but there were defects in traditional fair electronic contract signing protocols.Presents a new fair electronic contract signing protocol based on the off-line trusted third party.The protocol effectively prevents all kinds of security attacks,and improves the efficiency of the implementation.The security of the newly devised scheme is also examined and proved.It is showed that fair processes of exchange activities are guaranteed in this protocol.
A sealed-bid auction is an essential tool for trading commodities in modern society. However, the non-winning bidders in previously proposed sealed-bid auction schemes lack privacy protection. In this paper, we define a sealed-bid auction with strong privacy protection, which can protect the privacy of all non-winning bidders. In order to fulfil the task, we first present a quantum secret sharing protocol and a secure quantum summation protocol and then design their corresponding quantum circuits, where the security of the latter is guaranteed by the former, while the former is information-theoretically secure. We further present a quantum seal-bid auction (QSA) scheme with strong privacy protection based on the designed quantum protocols. In our QSA scheme, each bidder first encodes a private vector by his private bid and public agreement information, and then all bidders jointly compute the summations of their respective private vectors without a trusted third party. Finally, we verify the correctness and the feasibility of the proposed QSA scheme by circuit simulations in IBM Qiskit.
Today, hybrid cryptosystems are important part in structure of information telecommunication systems. That's why information security measures are extremely crucial at each stage of cryptosystem development life cycle. One of the most important specific of modern cryptosystems is the fact, that they often deployed in unprotected environment and outside the physically secured perimeter. That introduces new attack vectors, e.g. kleptographic attacks which include implementation forgery at endpoints. Such attack types are extremely dangerous because of the victim, who is a participant of some restricted area (electronic document flow, payment system, secure communication etc.), may induce threats for non-compromised participants (e.g., sensitive information leakage). One of the ways to solve mitigate this risks is development subliminal channel free cryptosystems which are resistant against different types of kleptographic attacks. In the article we show results belong to development of SETUP free cryptographic protocol development. Firstly, we suggest formal model for basic ''challenge-response'' protocol with subliminal channel. Using this formal model, we introduce sufficient conditions which lead to impossibility of existence of subliminal channels. Also the theorem about sufficient conditions has been formulated and proved. Further, we suggest improvements of basic protocols -- nonce generation and 1-round Diffie-Hellman key agreement protocol with design that is based of sufficient conditions. Using formalization of suggested enhanced protocols we formulated and proved the theorem about SETUP resistance property for these protocols. Our results may be useful for other SETUP free protocols development, this will be helpful for increasing security of hybrid cryptosystem.
Abstract With the development of information society, people are increasingly concerned about the security problems caused by information leakage, and digital signatures play an irreplaceable and important role in the protection of information security, which replace traditional manual signatures and seals in the network environment and have important roles such as anti-forgery, anti-tampering, anti-replay, identifiable identity and confidentiality [1]. However, with the in-depth study of quantum mechanics, it has been found that the confidentiality mechanism of classical digital signatures is under serious threat. Since quantum computing is a parallel operation with exponentially increasing operational capability, a series of complex mathematically difficult problems can be rapidly overcome. Based on the above, this paper proposes a multiple agent blind signature scheme, which adopts the key technologies such as the Unitary transformation and Hadamard gate operation, and adds multiple agent signature to quantum signature to improve the efficiency of the protocol, and adds blind signature to improve the security of the protocol. At the same time, the scheme uses quantum key distribution to ensure its unconditional security, which is applicable in systems such as electronic voting and electronic payment, and has certain anti-attack capability [2].