𝗣𝗮𝗽𝗲𝗿 𝗔𝗰𝗰𝗲𝗽𝘁𝗮𝗻𝗰𝗲 𝗔𝗻𝗻𝗼𝘂𝗻𝗰𝗲𝗺𝗲𝗻𝘁 : BMuSig2: Schnorr-Compatible Blind Multi-Signatures

Paper titled “BMuSig2: Schnorr-Compatible Blind Multi-Signatures” has been accepted at ACM Asia Conference on Computer and Communications Security (AsiaCCS 2026), Bangalore, India.

Authors: Kanchan Bisht, Keerthi Aiswarya Varshini, Shivam Sethi, Maria Francis, R. Kabaleeshwaran

👏 Congratulations to all the authors!

🔍 Key Highlight: Blind signatures and multi-signatures are well established, but their combination—blind multi-signatures (BMS)—is recent. This work presents BMuSig2, a practical scheme that enables a group of signers to produce a single compact signature for a hidden message, without learning the message or being able to trace it later.

BMuSig2 is fully compatible with Schnorr signatures (identical signing and verification), enabling seamless integration into blockchain systems that support on-chain Schnorr verification. It is proven secure in the concurrent setting and supported by a proof-of-concept implementation demonstrating feasibility.