Ed25519 is an instance of the Elliptic Curve based signature scheme EdDSA that was
recently introduced to solve an inconvenience of the more established ECDSA. Namely …

Abstract Side-Channel Analysis (SCA) represents a serious threat to the security of millions
of smart devices that form part of the so-called Internet of Things (IoT). Choosing the “right” …

ChaCha is a family of stream ciphers that are very efficient on constrainted platforms. In this
paper, we present electromagnetic side-channel analyses for two different software …

The current state of the art of Boolean masking for the modular addition operation in
software has a very high performance overhead. Firstly, the instruction count is very high …

Implementations of ARX ciphers are hoped to have some intrinsic side channel resilience
owing to the specific choice of cipher components: modular addition (A), rotation (R) and …

[en] This thesis is devoted to efficient and secure implementations of lightweight symmetric
cryptographic primitives for resource-constrained devices such as wireless sensors and …

In the last few years a new design paradigm, the so-called ARX (modular addition, rotation,
exclusive-or) ciphers, have gained popularity in part because of their non-linear operation's …

We study the success probabilities of two variants of Correlation Power Analysis (CPA) to
retrieve multiple secret bits. The target is a permutation-based symmetric cryptographic …

Abstract The Internet of Things (IoT) has become a reality: small connected devices feature
in everyday objects including childrens' toys, TVs, fridges, heating control units, etc. Supply …

[en] Cryptanalysis is the science which evaluates the security of a cryptosystem and detects
its weaknesses and flaws. Initially confined to the black-box model, where only the input and …