Analysis of GG18/GG20 Protocol Vulnerability CVE-20…

Recently, the Fireblocks team disclosed a vulnerability in the ECDSA threshold signature protocol GG18/GG20 in the paper Practical Key-Extraction Attacks in Leading MPC Wallets (CVE-2023-33241). By exploiting this vulnerability, a malicious participant can steal other participants’ key share with only 16 signatures. This article describes the details of the vulnerability with two participants, Alice and Bob, where […]