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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10200 - Computer and information sciences

Projekt

<a href="/cs/project/GA20-03426S" target="_blank" >GA20-03426S: Ověření a zlepšení bezpečnosti kryptografie eliptických křivek</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 19th International Conference on Security and Cryptography

ISBN

9789897585906

ISSN

2184-7711

e-ISSN

—

Počet stran výsledku

12

Strana od-do

305-316

Název nakladatele

SCITEPRESS

Místo vydání

Lisbon, Portugal

Místo konání akce

Lisbon, Portugal

Datum konání akce

1. 1. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000853004900027