Introducing ESSPI: a BitVMX milestone for improved efficiency
Sergio Demian Lerner, Martin Jonas, and Ariel Futoransky from Fairgate Labs and RootstockLabs introduce ESSPI, an optimized method for signing BitVMX program inputs using ECDSA/Schnorr signatures. It enhances efficiency over one-time signatures, reducing storage overhead and enabling verification of uncompressed inputs like SPV proofs, NiPoPoWs and STARKs.
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ESSPI: ECDSA / Schnorr Signed Program Input for BitVMX
To verify Schnorr/Winternitz signature equivalence and safeguard against malformed or fraudulent data publications, we incorporate a secondary BitVMX instance. Furthermore, we integrate a SHA-256 hasher into the BitVMX CPU to hash and verify unsigned program input.
Our most advanced scheme, based on enveloping, seamlessly integrates with standard Bitcoin transactions, ensuring minimal overhead while maintaining security and scalability.