The design of side-channel secure authenticated encryption (AE) is among the  most important challenges. To preserve appealing efficiency, we aim at  leakage-resilient AE modes supporting "leveled implementations" such that the  operations are mainly performed by cheap and weakly protected crypto  implementations. To this end, we first propose definitions of leakage-resilient  AE schemes. These definitions capture the setting with the leakages of all the  computations of an AE scheme, and require security for message encrypted with  fresh nonce. This offers various insights on leakage  security.

For  practical use, we design TETSponge mode from a strongly protected tweakable  blockcipher and a weakly protected duplex construction. The above is joint work  with Olivier Pereira, Thomas Peters, and François-Xavier  Standaert from UCL.

Biblio:  Chun Guo is a post-doc with the UCL Crypto Group in Belgium since 2017. He  obtained his BSc from East China Normal University in 2011 and his PhD from  University of Chinese Academy of Sciences in 2017 respectively. His research  focuses on various theoretical aspects of symmetric  cryptography.