Ringtail: Practical Two-Round Threshold Signatures from Learning with Errors
Cecilia Boschini, Darya Kaviani, Russell W. F. Lai, Giulio Malavolta, Akira Takahashi, Mehdi Tibouchi
IEEE Symposium on Security and Privacy 2025 · Day 1 · Threshold and Post-Quantum Cryptography
In an era increasingly shaped by the looming threat of quantum computing and the growing demand for robust cryptographic solutions, the talk "Ringtail: Practical Two-Round Threshold Signatures from Learning with Errors" presented a significant advancement in post-quantum cryptography. Delivered by Darya Kaviani at IEEE S&P, this presentation introduced **Ringtail**, a novel threshold signature scheme designed for efficiency and security in the post-quantum landscape. The core innovation lies in its ability to achieve a secure, two-round signing protocol while relying on well-established lattice-based assumptions, specifically **Module Learning With Errors (MLWE)** and **Self-Target Cyclotomic Isogeny System (CIS)**.