BLISK: Encoding Boolean Policies into a Single Schnorr Key
Oleksandr Kurbatov published a detailed follow-up on BLISK (Boolean circuit Logic Integrated into the Single Key), describing a proof-of-concept framework that compiles monotone boolean authorization policies into a single Schnorr verification key. The proposal combines MuSig2, ECDH, and NIZK proofs to enable structured policies like (A ∨ B) ∧ (C ∨ D) while preserving a single on-chain key and signature.
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BLISK: Boolean circuit Logic Integrated into the Single Key
We built a PoC framework that compiles a monotone boolean policy (AND/OR logic) over users’ long-term keys into a single signature verification key (one EC point). On-chain part remains boring: verification of one Schnorr signature against one key. All the policy “drama” happens off-chain.