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ETHTID: Deployable Threshold Information Disclosure on Ethereum

Stengele, Oliver ORCID iD icon; Raiber, Markus ORCID iD icon; Müller-Quade, Jorn; Hartenstein, Hannes

Abstract (englisch):

We address the Threshold Information Disclosure (TID) problem on Ethereum: An arbitrary number of users commit to the scheduled disclosure of their individual messages recorded on the Ethereum blockchain if and only if all such messages are disclosed. Before a disclosure, only the original sender of each message should know its contents. To accomplish this, we task a small council with executing a distributed generation and threshold sharing of an asymmetric key pair. The public key can be used to encrypt messages which only become readable once the threshold-shared decryption key is reconstructed at a predefined point in time and recorded onchain. With blockchains like Ethereum, it is possible to coordinate such procedures and attach economic stakes to the actions of participating individuals. In this paper, we present ETHTID, an Ethereum smart contract application to coordinate Threshold Information Disclosure. We base our implementation on an existing smart contract, ETHDKG, and optimise functionality and costs to fit the TID use case. While optimising for cost savings, we show that the security of the underlying cryptographic scheme is still maintained. ... mehr

Postprint §
DOI: 10.5445/IR/1000141617
Veröffentlicht am 31.12.2022
DOI: 10.1109/BCCA53669.2021.9657019
Zitationen: 2
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Informationssicherheit und Verlässlichkeit (KASTEL)
Kompetenzzentrum für angewandte Sicherheitstechnologie (KASTEL)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 30.12.2021
Sprache Englisch
Identifikator ISBN: 978-1-6654-2182-9
KITopen-ID: 1000141617
HGF-Programm 46.23.01 (POF IV, LK 01) Methods for Engineering Secure Systems
Erschienen in 3rd IEEE International Conference on Blockchain Computing and Applications (BCCA), Tartu, EST, November 15-16, 2021
Veranstaltung 3rd IEEE International Conference on Blockchain Computing and Applications (BCCA 2021), Online, 15.11.2021 – 16.11.2021
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Seiten 127–134
Projektinformation KASTEL_ISE (BMBF, 16KIS0754)
Schlagwörter distributed key generation, threshold encryption, smart contract, time-lock cryptography
Nachgewiesen in Dimensions
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