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Lookup NU author(s): Dr Aydin AbadiORCiD
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This paper introduces the notion of timed secret sharing (TSS), which establishes lower and upper time bounds for secret reconstruction in a threshold secret sharing scheme. Such time bounds are particularly useful in scenarios where an early or late reconstruction of a secret matters. We propose several new constructions that offer different security properties and show how they can be instantiated efficiently using novel techniques. We highlight how our ideas can be used to break the public goods game, which is an issue inherent to threshold secret sharing-based systems, without relying on incentive mechanisms. We achieve this through an upper time bound that can be implemented either via short-lived proofs, or the gradual release of additional shares, establishing a trade-off between time and fault tolerance. The latter inde- pendently provides robustness in the event of dropout by some portion of shareholders.
Author(s): Kavousi Alireza, Abadi Aydin, Jovanovic Philipp
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: Advances in Cryptology – ASIACRYPT 2024: 30th International Conference on the Theory and Application of Cryptology and Information Security
Year of Conference: 2024
Pages: 129-164
Online publication date: 10/12/2024
Acceptance date: 01/09/2024
Publisher: Springer-Verlag
URL: https://doi.org/10.1007/978-981-96-0941-3_5
DOI: 10.1007/978-981-96-0941-3_5
Library holdings: Search Newcastle University Library for this item
ISBN: 9789819609406
