ECC Protections against both Observation and Pertubation Attacks

Audrey Lucas (1) , Arnaud Tisserand (2)

1 CAIRN - Energy Efficient Computing ArchItectures with Embedded Reconfigurable Resources
2 Lab-STICC_UBS_CACS_MOCS

Two types of physical attacks are considered as important threats for embedded crypto-processors: observation attacks (or side channel attacks) and perturbation attacks (or fault injection attacks). In this work, we focus on protections against both types of attacks simultaneously for scalar multiplication in elliptic curve cryptography (ECC). A common protection against fault attacks on ECC is to verify if the current egular scalar multiplication using verifications at various frequency checking for some coordinate types. To protect the scalar, we added various methods based on iteration counters. We combined and tested these two countermeasures on different coordinates types for Weierstrass curves.

Mots clés: Elliptic-curve cryptography; Fault attacks; Side channel attacks; Countermeasures against fault and side-channel attacks

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

Audrey Lucas, Arnaud Tisserand. ECC Protections against both Observation and Pertubation Attacks. CryptArchi 2017: 15th International Workshops on Cryptographic architectures embedded in logic devices , Jun 2017, Smolenice, Slovakia. ⟨hal-01545752⟩