Authors:
Patrik Dobias
1
;
Sara Ricci
1
;
Petr Dzurenda
1
;
Lukas Malina
1
and
Nikita Snetkov
2
;
3
Affiliations:
1
Department of Telecommunications, Brno University of Technology, Brno, Czech Republic
;
2
Cybernetica AS, Mäealuse 2/1, 12618 Tallinn, Estonia
;
3
Tallinn University of Technology, Akadeemia Tee 15a, 12618 Tallinn, Estonia
Keyword(s):
Threshold Signature, Lattice-Based Cryptography, Software Implementation, Dilithium, Homomorphic Commitment, Embedded Systems, Constrained Devices.
Abstract:
Threshold signatures have gained increased attention especially due to their recent applications in blockchain technologies. In fact, current cryptocurrencies such as Bitcoin, and Cardano started to support multi-signature transactions. Even if the Schnorr-based threshold signatures improve the blockchain’s privacy and scalability, these schemes do not provide post-quantum security. In this paper, we propose the optimization of the DS2 lattice-based (n,n)-threshold signature scheme and present its practical implementation. Moreover, we evaluate our optimized implementation of the DS2 scheme on different platforms. The results demonstrate that our implementation is easily portable and executable on constrained devices based on ARM Cortex-A53, ARM Cortex-M3, and ESP32 architectures.