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

D 2022

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

DUFKA, Antonín, Vladimír SEDLÁČEK a Petr ŠVENDA

Základní údaje

Originální název

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

Autoři

DUFKA, Antonín (203 Česká republika, domácí), Vladimír SEDLÁČEK (203 Česká republika, domácí) a Petr ŠVENDA (203 Česká republika, domácí)

Vydání

Lisbon, Portugal, Proceedings of the 19th International Conference on Security and Cryptography, od s. 305-316, 12 s. 2022

Nakladatel

SCITEPRESS

Další údaje

Jazyk

angličtina

Typ výsledku

Stať ve sborníku

Obor

10200 1.2 Computer and information sciences

Stát vydavatele

Portugalsko

Utajení

není předmětem státního či obchodního tajemství

Forma vydání

elektronická verze "online"

Odkazy

Odkaz na autorský pre-print

Kód RIV

RIV/00216224:14330/22:00126306

Organizační jednotka

Fakulta informatiky

ISBN

978-989-758-590-6

ISSN

DOI

http://dx.doi.org/10.5220/0011145600003283

UT WoS

000853004900027

Klíčová slova anglicky

Cryptographic Hardware; Multi-party Computation; Nonce Agreement; Schnorr Signatures; Interoperability

Štítky

core_B, firank_B

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 14. 5. 2024 12:45, RNDr. Pavel Šmerk, Ph.D.

Anotace

V originále

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.

Návaznosti

GA20-03426S, projekt VaV

Název: Ověření a zlepšení bezpečnosti kryptografie eliptických křivek

Investor: Grantová agentura ČR, Ověření a zlepšení bezpečnosti kryptografie eliptických křivek

Citovat

DUFKA, Antonín, Vladimír SEDLÁČEK a Petr ŠVENDA. SHINE: Resilience via Practical Interoperability of Multi-party Schnorr Signature Schemes. Online. In Proceedings of the 19th International Conference on Security and Cryptography. Lisbon, Portugal: SCITEPRESS, 2022, s. 305-316. ISBN 978-989-758-590-6. Dostupné z: https://dx.doi.org/10.5220/0011145600003283.

@inproceedings{1875862,
   author = {Dufka, Antonín and Sedláček, Vladimír and Švenda, Petr},
   address = {Lisbon, Portugal},
   booktitle = {Proceedings of the 19th International Conference on Security and Cryptography},
   doi = {http://dx.doi.org/10.5220/0011145600003283},
   keywords = {Cryptographic Hardware; Multi-party Computation; Nonce Agreement; Schnorr Signatures; Interoperability},
   howpublished = {elektronická verze "online"},
   language = {eng},
   location = {Lisbon, Portugal},
   isbn = {978-989-758-590-6},
   pages = {305-316},
   publisher = {SCITEPRESS},
   title = {SHINE: Resilience via Practical Interoperability of Multi-party Schnorr Signature Schemes},
   url = {https://crocs.fi.muni.cz/_media/publications/pdf/2022-secrypt-shine.pdf},
   year = {2022}
}

TY  - JOUR
ID  - 1875862
AU  - Dufka, Antonín - Sedláček, Vladimír - Švenda, Petr
PY  - 2022
TI  - SHINE: Resilience via Practical Interoperability of Multi-party Schnorr Signature Schemes
PB  - SCITEPRESS
CY  - Lisbon, Portugal
SN  - 9789897585906
KW  - Cryptographic Hardware
KW  - Multi-party Computation
KW  - Nonce Agreement
KW  - Schnorr Signatures
KW  - Interoperability
UR  - https://crocs.fi.muni.cz/_media/publications/pdf/2022-secrypt-shine.pdf
N2  - 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.
ER  -

DUFKA, Antonín, Vladimír SEDLÁČEK a Petr ŠVENDA. SHINE: Resilience via Practical Interoperability of Multi-party Schnorr Signature Schemes. Online. In \textit{Proceedings of the 19th International Conference on Security and Cryptography}. Lisbon, Portugal: SCITEPRESS, 2022, s.~305-316. ISBN~978-989-758-590-6. Dostupné z: https://dx.doi.org/10.5220/0011145600003283.

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