qTESLA is a lattice-based digital signature scheme designed to be secure even against attackers armed with a quantum computer. A proposal for qTESLA was submitted to the US National Institute of Standards and Technology (NIST) Post-Quantum Cryptography Project. Researchers at ISARA collaborated on this proposal with academic and industry experts from around the world.
The designers are:
qTESLA is distinguished from other lattice-based signature schemes by its strong theoretical security guarantee. The security reduction from the underlying hard problem is tight, meaning that an adversary who can break the signature scheme with a reasonable chance of success must also be able to solve the underlying hard problem with that same chance of success. (Then, since the underlying problem is hard, breaking the signature scheme must also be hard.) Moreover, the security reduction holds in the quantum random oracle model, meaning that qTESLA remains secure even when the adversary uses the scheme’s hash function on a quantum superposition of inputs.
Researchers at ISARA played a leading role in the proof of TESLA’s strong theoretical security guarantee and is the basis for qTESLA. The fruits of this research were published in the proceedings of the PQCrypto 2017 conference in Utrecht, the Netherlands. Read the published research. ISARA played a supporting role in drafting the qTESLA NIST submission.
The official qTESLA web page is maintained by our colleagues in Darmstadt, Germany. Visit the official qTESLA web page.
Thu Dec 21, 2017