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Standardizing Protocols for Threshold ECDSA

September 26, 2023


Jonathan Katz - Dfns


Abstract. In this presentation, I will begin by describing different deployment scenarios for threshold cryptography (and threshold signatures in particular), especially highlighting the unique aspects of threshold protocols run in a "federated key-management network." I will then suggest that NIST standardize two threshold variants for ECDSA signatures: a dishonest-majority protocol and an honest-majority protocol. Finally, I will discuss some observations we have had at Dfns while implementing and deploying the dishonest-majority CGGMP21 protocol for threshold ECDSA, and describe details of an honest-majority threshold ECDSA protocol we have been developing.

[Slides] [Video]

Presented at

MPTS 2023: NIST Workshop (virtual) on Multi-Party Threshold Schemes 2023

Event Details



Related Topics

Security and Privacy: cryptography

Created September 21, 2023, Updated October 25, 2023