International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 22 May 2020

Gilles Barthe, Marc Gourjon, Benjamin Gregoire, Maximilian Orlt, Clara Paglialonga, Lars Porth
ePrint Report ePrint Report
We propose a new approach for building efficient, provably secure, and practically hardened assembly implementations of masked algorithms. Our approach is based on a Domain Specific Language in which users can write efficient assembly implementations and fine-grained leakage models. The latter are then used as a basis for formal verification, allowing for the first time formal guarantees for a broad range of leakage effects not addressed by prior work. The practical benefits of our approach are demonstrated through a case study of the PRESENT S-Box: we develop a highly optimized and provably secure masked implementation, and show through practical evaluation based on TVLA that our implementation is practically resilient. Our approach significantly narrows the gap between formal verification of masking and practical security.
Expand

Additional news items may be found on the IACR news page.