The Pedersen Commitment - Overview
Pedersen commitment provides a way to commit to a secret value while keeping it hidden, and ensures the value cannot be changed later.
2025, Nov 22 —- Posts
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Seal: Identity-Based Encryption for Onchain Access Control
Seal is a framework that allows developers to encrypt data using Identity-Based Encryption (IBE) while enforcing onchain access policies on Sui.
2025, Sep 27 —Understanding zk-SNARK: A Deep Dive into Zero-Knowledge Proofs
This article explains the cryptography behind zk-SNARKs and compares them to other zero-knowledge proofs like STARKs and Bulletproofs.
2025, Jul 29 —Blockchain wallets on AWS with Fireblocks and Circle
Deep dive into blockchain wallets with Circle and Fireblocks and explore how they use AWS services such as AWS Nitro Enclave
2025, Jul 29 —Poseidon Hash Function - Overview
The Poseidon hash function is a cryptographic hash function specifically designed for use in zero-knowledge proof systems like SNARKs and STARKs.
2025, May 27 —Lattice-Based Cryptography - The Short Integer Solution (SIS) Problem
Short integer solution (SIS)is an average-case problems used in lattice-based cryptography constructions. SIS is one of the problems believed to be hard even for quantum computers.
2025, Apr 23 —Bitcoin Keys 102: How Wallets Generate Seed Phrases and Private Keys
This article is a deep dive into the generation of private keys until obtaining a public address through the main related BIPs - BIP-32 and BIP-39
2025, Mar 27 —Chainlink DECO, zkTLS oracle
DECO is a zkTLS-oracle made by Chainlink for authenticating and verifying web data in a privacy-preserving manner.
2025, Jan 13 —Hardware Security - Understanding Fault Injection Attack
Fault injection attack (FIA) is a technique that targets the hardware itself to create unexpected behaviors in systems, often with catastrophic consequences.
2024, Dec 30 —Mutual TLS (mTLS) - Overview
Mutual TLS (mTLS) is an extension of the standard TLS protocol which requires both the client and server to present and validate certificates, enabling mutual authentication.
2024, Dec 16 —HMAC - Hash-Based Message Authentication Code
HMAC (Hash-Based Message Authentication Code) is a cryptographic algorithm used to ensure both integrity and authenticity of a message.
2024, Nov 27 —TLS 1.3 - Overview
Transport Layer Security (TLS) 1.3 is the latest version of the TLS protocol, designed to enhance internet security, speed, and privacy.
2024, Nov 04 —Differential Cryptanalysis - Targeting Hash Functions and Cryptographic Algorithms
Differential cryptanalysis is a method to attack symmetric cryptographic algorithms, such as block ciphers, by analyzing the impact of specific input differences on output differences after several rounds of encryption.
2024, Oct 30 —Introduction to Shamir’s Secret Sharing - How to share a secret
Shamir's Secret Sharing (SSS) is a cryptographic technique that allows to split a secret, such as a private key, into multiple shares distributed among trusted parties. Only a specified threshold of shares is required to reconstruct the secret, ensuring security against unauthorized access.
2024, Oct 29 —Bitcoin Keys 101 - From seed phrase to address
This article explains the generation of private keys in Bitcoin until obtaining a public address and the different type of addresses.
2024, Oct 28 —Overview of ECDSA - Elliptic Curve Digital Signature Algorithm
Learn how ECDSA (Elliptic Curve Digital Signature Algorithm) works, its role in digital signatures, and its different use cases, notably in Blockchain.
2024, Oct 23 —Overview, security and applications of Multi-Party Computation (MPC)
This article is an introduction to Multi-Party Computation (MPC)Mathematical Foundation of MPC
2024, Oct 21 —Trezor Crypto Wallet – Cryptography and Security
This article presents the different types of crypto wallets (hot, warm, cold) and their associated risks
2024, Oct 15 —Crypto Wallets Explained - Types, Risks, and How to select it
This article presents the different types of crypto wallets (hot, warm, cold) and their associated risks
2024, Oct 08 —Zero Knowledge Proofs with Bulletproof
Bulletproofs are efficient and compact zero-knowledge proofs. They're enhancing privacy and scalability in blockchain systems by reducing data size and verification time.
2024, Aug 13 —Main Concept Behind Zero-Knowledge Proof
This article is a summary of the main concepts behind Zero-Knowledge Proof (ZKP).
2024, Jun 17 —Overview of Zero-Knowledge development framework
Overview of the main development frameworks to build zero-knowledge system which Plonky2(Polygon), Halo2(Zcash), Boojum (Matter Labs),...
2024, Jun 10 —Winternitz One-Time Signature(OTS)
Presentation of Winternitz One-Time Signature (W-OST), a post quantum algorithm which relies on hash function (e.g SHA-256)
2024, May 30 —Pedersen Hash Function Overview
Presentation of the hash function Pedersen, which is efficient for zero-knowledge circuits (e.g. zk-SNARK)
2024, May 07 —Ethereum Staking - How It Works
Staking in Ethereum is a key functionality. This article explains the main concepts behind it - BLS signature, slashing, Withdrawal address,...
2024, Mar 28 —Deep dive into MetaMask Secrets
This article focuses on the different secrets available on Metamask, one of the most used crypto wallets.
2023, Jul 20 —Encrypt a USB key on Windows with Bitlocker
This article details how to encrypt a USB drive on Windows with Bitlocker, an encryption tool offered by Windows.
2022, Oct 06 —How to create a multisig wallet with Gnosis Safe
This tutorial present the different steps to create a multi signature wallet with Gnosis Safe on Ethereum.
2022, Aug 12 —Le protocole WEP et ses vulnérabilités
Cet article présente le protocole Wifi WEP (Wired Equivalent Privacy) en se focalisant sur les aspects sécuritaires (confidentialité, intégrité, authenticité).
2022, Apr 28 —Tester la résistance d'un crypto système à un niveau d'attaques
Cet article aborde les différents tests et jeux auxquels on peut soumettre un crypto système pour vérifier sa robustesse (p.ex. IND-CPA et IND-CAA).
2022, Apr 24 —Le mode opératoire GCM
Cet article présente le mode opératoire de chiffrement authentifié GCM avec une analyse sur sa sécurité (confidentialité, intégrité, authenticité et la génération d'IVs).
2022, Apr 22 —Chiffrement hybride sur les courbes elliptiques avec ECIES
Cet article présente le schéma de chiffrement intégré ECIES (Elliptic Curve Integrated Encryption Scheme) permettant de réaliser du chiffrement hybride.
2022, Apr 22 —Le mode opératoire ECB
Cet article présente le mode opératoire ECB avec une analyse sur sa sécurité (confidentialité, intégrité, authenticité).
2022, Apr 22 —Le mode opératoire CTR
Cet article présente le mode opératoire CTR avec une analyse sur sa sécurité (confidentialité, intégrité, authenticité et la génération d'IV).
2022, Apr 22 —Le mode opératoire CBC
Cet article présente le mode d'opération CBC en analysant également sa sécurité (réutilisation d'IV, répétition de blocs).
2022, Feb 27 —Les Courbes Elliptiques avec SageMath
Cet article explique l'implémentation des courbes elliptiques avec la librairie SageMath, par exemple la définition et l'addition des points sur une courbe.
2022, Feb 27 —Diffie-Hellman expliqué en python
Présentation du protocole de mise au point de clé Diffie-Hellman (key-agreement protocol) avec un exemple d'implémentation pour mieux comprendre les principes.
2021, Oct 28 —Analyser un message chiffré [transposition/substitution]
Cet article présente les manières d'analyser un message dont on ne connait pas la méthode de chiffrement employé. Il se concentre sur les chiffrements classiques ":" substitution mono-alphabétique (César, Vigenère) et la transposition comme le chiffre de RailFence.
2021, Aug 09 —Le Logarithme Discret sur courbe elliptique avec SageMath
Cet article traite du problème du logarithme discret sur une courbe elliptique. Il contient un exemple faisant appel à la librairie python SageMath.
2021, Jul 30 —Chiffrement RSA avec SageMath
Cet article explique comment implémenter le chiffrement RSA avec SageMath, logiciel permettant d'effectuer des opérations mathématiques utiles en cryptographie.
2021, Jul 27 —