An ASIC Implementation of the AES SBoxes
CT-RSA '02 Proceedings of the The Cryptographer's Track at the RSA Conference on Topics in Cryptology
DPA Countermeasure Based on the "Masking Method"
ICISC '01 Proceedings of the 4th International Conference Seoul on Information Security and Cryptology
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Securing the AES Finalists Against Power Analysis Attacks
FSE '00 Proceedings of the 7th International Workshop on Fast Software Encryption
Power Analysis Attacks of Modular Exponentiation in Smartcards
CHES '99 Proceedings of the First International Workshop on Cryptographic Hardware and Embedded Systems
Efficient Rijndael Encryption Implementation with Composite Field Arithmetic
CHES '01 Proceedings of the Third International Workshop on Cryptographic Hardware and Embedded Systems
An Implementation of DES and AES, Secure against Some Attacks
CHES '01 Proceedings of the Third International Workshop on Cryptographic Hardware and Embedded Systems
Multiplicative Masking and Power Analysis of AES
CHES '02 Revised Papers from the 4th International Workshop on Cryptographic Hardware and Embedded Systems
An Optimized S-Box Circuit Architecture for Low Power AES Design
CHES '02 Revised Papers from the 4th International Workshop on Cryptographic Hardware and Embedded Systems
Simplified Adaptive Multiplicative Masking for AES
CHES '02 Revised Papers from the 4th International Workshop on Cryptographic Hardware and Embedded Systems
Investigations of power analysis attacks on smartcards
WOST'99 Proceedings of the USENIX Workshop on Smartcard Technology on USENIX Workshop on Smartcard Technology
Attack and Improvement of a Secure S-Box Calculation Based on the Fourier Transform
CHES '08 Proceeding sof the 10th international workshop on Cryptographic Hardware and Embedded Systems
CHES '08 Proceeding sof the 10th international workshop on Cryptographic Hardware and Embedded Systems
A Unified Framework for the Analysis of Side-Channel Key Recovery Attacks
EUROCRYPT '09 Proceedings of the 28th Annual International Conference on Advances in Cryptology: the Theory and Applications of Cryptographic Techniques
Analysis of the split mask countermeasure for embedded systems
WESS '09 Proceedings of the 4th Workshop on Embedded Systems Security
A very compact "Perfectly masked" S-box for AES
ACNS'08 Proceedings of the 6th international conference on Applied cryptography and network security
Mixed bases for efficient inversion in F((22)2)2 and conversion matrices of SubBytes of AES
CHES'10 Proceedings of the 12th international conference on Cryptographic hardware and embedded systems
Secure multiplicative masking of power functions
ACNS'10 Proceedings of the 8th international conference on Applied cryptography and network security
Secure Hardware Implementation of Nonlinear Functions in the Presence of Glitches
Journal of Cryptology - Special Issue on Hardware and Security
Montgomery's trick and fast implementation of masked AES
AFRICACRYPT'11 Proceedings of the 4th international conference on Progress in cryptology in Africa
Higher-order glitches free implementation of the AES using secure multi-party computation protocols
CHES'11 Proceedings of the 13th international conference on Cryptographic hardware and embedded systems
Provably secure masking of AES
SAC'04 Proceedings of the 11th international conference on Selected Areas in Cryptography
A side-channel analysis resistant description of the AES s-box
FSE'05 Proceedings of the 12th international conference on Fast Software Encryption
Provably secure s-box implementation based on fourier transform
CHES'06 Proceedings of the 8th international conference on Cryptographic Hardware and Embedded Systems
Secure and efficient AES software implementation for smart cards
WISA'04 Proceedings of the 5th international conference on Information Security Applications
Successfully attacking masked AES hardware implementations
CHES'05 Proceedings of the 7th international conference on Cryptographic hardware and embedded systems
CHES'05 Proceedings of the 7th international conference on Cryptographic hardware and embedded systems
Security evaluation of a DPA-Resistant s-box based on the fourier transform
ICICS'09 Proceedings of the 11th international conference on Information and Communications Security
An efficient masking scheme for AES software implementations
WISA'05 Proceedings of the 6th international conference on Information Security Applications
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Masking schemes to secure AES implementations against side-channel attacks is a topic of ongoing research. The most sensitive part of the AES is the non-linear SubBytes operation, in particular, the inversion in GF(28), the Galois field of 28 elements. In hardware implementations, it is well known that the use of the tower of extensions $${GF(2)\subset GF(2^2)\subset GF(2^4)\subset GF(2^8)}$$ leads to a more efficient inversion. We propose to use a random isomorphism instead of a fixed one. Then, we study the effect of this randomization in terms of security and efficiency. Considering the field extension GF(28)/GF(24), the inverse operation leads to computation of its norm in GF(24). Hence, in order to thwart side-channel attack, we manage to spread the values of norms over GF(24). Combined with a technique of boolean masking in tower fields, our countermeasure strengthens resistance against first-order differential side-channel attacks.