threshold-signatures

Combining threshold signature schemes with trusted execution environments (TEEs) can strengthen MPC deployments, as long as you treat the TEE as a defense-in-depth layer rather than a substitute for a sound protocol.

We found a vulnerability in a threshold signature scheme that allows an attacker to recover the signing key of threshold ECDSA implementations that are based on Oblivious Transfer (OT). A malicious participant of the threshold signing protocols could perform selective abort attacks during the OT extension subprotocol, recover the secret […]