C

cryptography

fastCrypter is a powerful Python library that combines advanced compression and encryption techniques with native C/C++ acceleration for maximum performance. It provides a comprehensive suite of tools for secure data handling, from simple file encryption to complex custom encoding schemes.

BalanceSeal is an AGPL 3.0+ cryptographic audit module for cryptocurrency exchanges and digital wallets that generates a verifiable, time-frozen snapshot of all user assets at the moment an account is terminated. It aggregates on-chain and off-chain balances, reconciles holdings across systems, locks market pricing at the termination timestamp, and produces tamper-evident reports for compliance, auditing, and transparency. https://roxanneardary.com/balanceseal/

Umbrix is a commercial-grade, open-source VPN designed for full network obfuscation, multi-node chaining, and AI-assisted adaptive privacy. It masks everything from IP and location to device telemetry, provides cross-platform support, and includes advanced features like multi-hop routing, stealth traffic transforms, decentralized node management, and post-quantum-ready cryptography. Built for maximum anonymity, Umbrix ensures your online activity remains invisible, secure, and untraceable. https://roxanneardary.com/umbrix/

SelfRoot is an open-source deterministic identity infrastructure project that replaces passwords and centralized identity systems with cryptographic authentication derived from live human presence. It processes biometrics locally, converts them into non-reversible templates, and uses them to unlock hardware-bound cryptographic keys for secure challenge–response authentication, without storing or transmitting biometric data. https://roxanneardary.com/selfroot/

Cryptographic protocol and security-related protocol piece parser.

Free repository of cryptography-related data.

CryptoLyzer is a fast, flexible, and comprehensive server cryptographic protocol (TLS, SSL, SSH, DNSSEC) and related setting (HTTP headers, DNS records) analyzer and fingerprint (JA3, HASSH tag) generator with Python API and CLI.

A lightweight password manager written in C.

Vault is a personal project built to explore low-level programming concepts through the development of a secure password manager. The goal is to understand how storage, memory management, file handling, and cryptographic mechanisms work by implementing the core components from scratch.

A package that handles key pair generation and encryption / decryption of secrets using keys

VeritasVote is an open-source, tamper-evident in-person voting machine. Fully auditable, cryptographically verifiable, and backed by paper ballots, it provides transparent and secure elections. Hardware and software are fully open for inspection, ensuring every vote can be trusted. https://roxanneardary.com/veritasvote/

These projects form an open-source suite of AI infrastructure tools built for modularity, security, and self-hosted deployment, allowing users to maintain full ownership and control of their systems and data. They deliver interoperable AI functions including automation, data retrieval, encryption, and identity management that can be applied across many different industries. https://roxanneardary.com/ai-infrastructure/

Blockchain specifications define an institutional blockchain system built on distributed custody using Multi-Party Computation (MPC), where no single entity can access or control private keys. All transactions are governed through policy engines, role-based permissions, and full audit logging instead of centralized custody. It supports tokenization and multi-chain interoperability for real-world assets like real estate and financial instruments, with deployment across on-prem, sovereign cloud, and hybrid environments. The result is a secure, auditable infrastructure for programmable assets with built-in compliance and institutional control. https://roxanneardary.com/blockchain/

FluxCore Mobility is a modular, edge-first vehicle intelligence system designed to keep all critical AI processing local to the vehicle while enforcing strict, cryptographically validated user consent for any external data sharing. Built under the AGPL 3.0+ license, it prioritizes privacy, transparency, and deterministic safety by separating core driving logic from optional cloud and experimental features. Its architecture ensures that no data leaves the system without explicit, time-bound approval, making it a framework for consent-bound automotive intelligence rather than continuous background connectivity. https://roxanneardary.com/fluxcore-mobility/

⚡ Essential JavaScript libraries/utilities for Node.js and the web

D(HE)ater is a proof of concept implementation of the D(HE)at attack (CVE-2002-20001) through which denial-of-service can be performed by enforcing the Diffie-Hellman key exchange.

For more information visit https://dheatattack.com

Ready-to-use Docker image that combine secret management tool SOPS and encryption tool age.

The firmware engineering home of the Cryptohack electronic badge project.

The mobile engineering home of the Cryptohack Badge project.

CommonVote System is an open-source, distributed voting infrastructure protocol designed to enable secure, verifiable, and jurisdiction-adaptable elections. It uses end-to-end encryption, cryptographic identity verification, and one-time voting tokens to ensure ballot integrity while preserving voter privacy. The system separates identity, voting, and audit layers, with blockchain-based immutable vote recording and a compliance-driven jurisdiction plugin model that allows states and countries to define legal election rules without modifying the core cryptographic system. https://roxanneardary.com/commonvote-system/

A Kotlin/JVM cryptography library designed for ease-of-use while retaining security.