SHINE: Resilience via Practical Interoperability of Multi-party Schnorr Signature Schemes

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14330%2F22%3A00126306" target="_blank" >RIV/00216224:14330/22:00126306 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.5220/0011145600003283" target="_blank" >http://dx.doi.org/10.5220/0011145600003283</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5220/0011145600003283" target="_blank" >10.5220/0011145600003283</a>

Result language
angličtina
Original language name
SHINE: Resilience via Practical Interoperability of Multi-party Schnorr Signature Schemes
Original language description
Secure multi-party cryptographic protocols divide the secret key among multiple devices and never reconstruct it in a single place. Such a mechanism protects against malware, code vulnerabilities, and backdoors when different implementations and devices are used. Still, a protocol-level issue may result in a compromise, and up until now, it has been unknown how to combine different unmodified multi-party protocols. We study the interoperability of different multi-party Schnorr signature schemes and classify them based on their approach to the nonce agreement. We identify issues that could hinder in-class interoperability, and we propose a trustless mediator that facilitates interoperability among different classes in certain cases. Besides mitigating the risks, interoperability provides usability and performance benefits, as protocols better suited for special devices can be used together with more general protocols. We make use of these advantages in our new multi-signature scheme SHINE, which is optimized for resource-limited devices like cryptographic smartcards while being interoperable with popular schemes such as MSDL, MuSig2, or SpeedyMuSig.
Czech name
—
Czech description
—

Project
<a href="/en/project/GA20-03426S" target="_blank" >GA20-03426S: Examining and improving security of elliptic curve cryptography</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of the 19th International Conference on Security and Cryptography
ISBN
9789897585906
ISSN
2184-7711
e-ISSN
—
Number of pages
12
Pages from-to
305-316
Publisher name
SCITEPRESS
Place of publication
Lisbon, Portugal
Event location
Lisbon, Portugal
Event date
Jan 1, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000853004900027

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