Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


MPC-based key management – Using threshold trust to address different threat models

November 5, 2020


Jakob Pagter - Sepior


Abstract: In key management based on Multi-Party Computation (MPC) cryptographic primitives are implemented through a distributed protocol executed by a set of MPC components. A fundamental but often ignored part of this, is the way in which control over the individual MPC components is used to address the threat model of the application. This allows the nice mathematical properties of threshold cryptography to address different trust models or different threat models. In this brief we will provide two examples (one where each MPC node is owned by the same enterprise, and one where nodes reflect different policy elements as well as end-user control) and use these to start a discussion about constructing a taxonomy for how to align threats with what it offered by security architectures offered by MPC.

Presented at

NIST Workshop on Multi-Party Threshold Schemes (MPTS) 2020.

Event Details



Related Topics

Security and Privacy: cryptography

Created May 04, 2021, Updated June 07, 2021