Fair exchange of valuable information: A generalised framework

Q. Shi, N. Zhang, M. Merabti

    Research output: Contribution to journalArticlepeer-review


    This paper aims to propose a general framework for fair exchanges of valuable information through digital signatures and cryptographic keys over networks, which are essential for e-commerce (electronic commerce) applications to prevent fraudulent or unfair on-line activities. This new framework incorporates a set of signature schemes as primitives, offers three generalised functions for the generation, verification and recovery of verifiably encrypted signatures and keys using these signature schemes, and provides a generic protocol built on these thee functions to accomplish various fair exchange scenarios of valuable information. The security analysis of the framework is also presented to confirm its assurance of fairness in exchange. Moreover, a comparison with related work is carried out to demonstrate the novel features of the framework, which can be highlighted by a good blend of generality, flexibility, efficiency and simplicity offered by the framework. © 2010 Elsevier Inc.
    Original languageEnglish
    Pages (from-to)348-371
    Number of pages23
    JournalJournal of Computer and System Sciences
    Issue number2
    Publication statusPublished - Mar 2011


    • Communication protocols
    • Digital signatures
    • E-commerce
    • Fair exchange
    • Verifiable encryption


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