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- W4383112911 abstract "In this paper, we present two proposals for multi-two-party contract signing with blockchain support. In the scenario in this paper, a customer wants to purchase products/services from multiple vendors with the requirement that she wants all or none of the products. Our proposals satisfy the security requirements for contract signing: fairness, timeliness, nonrepudiation, effectiveness and confidentiality. Furthermore, one of the two proposals requires the execution of blockchain functions only in the case of dishonest behaviour (bc-optimistic). The only previous solution found in the literature for the multi-two-party contract signing scenario requires the use of a trusted third party (TTP); however, the approach is highly inefficient, requiring the exchange of many messages. Our proposals are much more efficient than the TTP-based proposal, as our proposal reduces the number of exchanged messages required to complete multi-two-party contract signing. As the use of blockchain incurs a fee, we prove the technological and economic viability of our proposals on different blockchains." @default.
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- W4383112911 date "2023-01-01" @default.
- W4383112911 modified "2023-10-14" @default.
- W4383112911 title "Enforcing Fairness With Blockchain Support: Proposals for Multi-Two-Party Contract Signing" @default.
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- W4383112911 doi "https://doi.org/10.1109/access.2023.3292160" @default.
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