Fault Round Modification Analysis of the Advanced Encryption Standard

Jean-Max Dutertre (1) , Amir Pasha Mirbaha (1) , David Naccache (2, 3) , Anne-Lise Ribotta (1) , Assia Tria (4, 1) , Thierry Vaschalde (1)

1 SAS-ENSMSE - Département Systèmes et Architectures Sécurisés
2 CASCADE - Construction and Analysis of Systems for Confidentiality and Authenticity of Data and Entities
3 LIENS - Laboratoire d'informatique de l'école normale supérieure
4 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

This paper describes a new physical analysis technique based on changing the number of the AES rounds. It is an extension of the already known Round Reduction Analysis techniques. Round Modification Analysis is a specific algorithm modification attack. However, the cryptanalysis of the obtained erroneous ciphertexts resorts to the differentiation techniques used by Differential Fault Analysis. Faults were induced thanks to a laser in a software AES, either on the round counter itself or on the reference of its total round number, to obtain an increase or a decrease in the number of rounds. We report here successful attacks and their corresponding cryptanalysis.

Domaines: Cryptographie et sécurité [cs.CR]; Micro et nanotechnologies/Microélectronique

Jean-Max Dutertre, Amir Pasha Mirbaha, David Naccache, Anne-Lise Ribotta, Assia Tria, et al.. Fault Round Modification Analysis of the Advanced Encryption Standard. Hardware-Oriented Security and Trust (HOST), 2012, Jun 2012, San Francisco, United States. pp.140--145, ⟨10.1109/HST.2012.6224334⟩. ⟨emse-00742567⟩