Publications

Quantum readiness: Lattice-based PQC

11/10/2024 This is the third article in the "Quantum readiness" series. This article aims at giving a rough introduction to lattices in the context of cryptography. It follows the first article, "Quantum readiness: Introduction to Modern Cryptography", and the second article, "Quantum readiness: Hash-based signatures". Knowledge of the concepts introduced in those articles such as indistinguishability games and hash functions, as well as standard knowledge of linear algebra, is strongly recommended. If you are unfamiliar with linear algebra, ...

Defend against vampires with 10 gbps network encryption

13/09/2024 Discover how attackers can sniff your data on network cables and how you can defend against it, by encrypting on-the-fly all your ethernet traffic with very good performance. Keywords : wireguard, vxlan, tapping, fiber optics, lan2lan, macsec

Quantum readiness: Hash-based signatures

26/08/2024 Building robust digital signature algorithms is one of the main challenges in post-quantum cryptography, as classical signatures such as ECDSA and RSA are broken by quantum computers. Thankfully, in the past decades, the academic field has come up with multiple quantum-resistant algorithms which are now being standardized and implemented in modern software. This article highlights XMSS and SPHINCS+, two digital signature algorithms which rely on the well-known robustness of hash functions against quantum computers. However, each one c...

Quantum readiness: Introduction to Modern Cryptography

18/04/2024 This article is the first of a series of articles regarding Post-Quantum Cryptography in 2024. It builds upon Synacktiv's 2021 article, "Is it post quantum time yet?", by presenting the evolutions that happened since then in the PQC world as well as various constructions that will be reused in the next articles. These articles will especially focus on giving the reader a good understanding of the attack surface one should consider when designing and implementing a PQC algorithm. This article considers that the concepts presented in o...

Is it post quantum time yet?

28/09/2021 Quantum computing. Among all the fashionable IT buzzwords, this one comes prominently. Quantum computing, or the idea people get of it, feeds a lot of fantasy. This trend is supported by the news that sometimes relay hazy information about a topic they do not fully grasp. Getting a precise view of the state of quantum computing and its implications on security is not easy if you are not familiar with the topic. In this article, we will try to answer this seemingly simple question: is it post quantum time yet?