"Building CryptoFlex: An Offline, Quantum-Safe Policy Engine for Python 🔐"

A developer has built CryptoFlex, an open-source, local-first crypto-agility policy engine for Python 3.10+ that dynamically swaps encryption primitives without code redeploys. It orchestrates classical X25519 and post-quantum ML-KEM via liboqs behind a decision engine, but is at v0.1.0 and has not undergone an independent security audit, so it is not recommended for production.

Most modern post-quantum cryptography PQC discussions focus heavily on live network traffic—like Signal’s PQXDH or Chrome's X25519Kyber768. But what about local, offline, file-based applications ? Desktop tools, local backup vaults, and offline embedded/IoT systems are often left hardcoding legacy cryptographic stacks. If that math gets broken or weakened in the future, the whole application requires a painful, massive rewrite. To explore a solution, I built CryptoFlex : an open-source, local-first crypto-agility policy engine for Python 3.10+. Crypto-agility means your application can dynamically swap its underlying encryption primitives without breaking your core application logic or requiring a code redeploy. cryptoflex doesn't invent new math. Instead, it orchestrates existing, trusted primitives—classical X25519 and post-quantum ML-KEM via liboqs —behind a localized decision engine. Application Code ↓ 🔐 CryptoFlex PolicyEngine ↓ Evaluates Local Environment Signals ↓ Selected Crypto Profile e.g., X25519 + ML-KEM-768 Hybrid degraded=True status back to your logs instead of crashing your app unless you strictly enforce require quantum safe=True . Full Disclosure: This project is at version v0.1.0 and has not undergone an independent, third-party security audit. While the underlying primitives X25519 and liboqs-python are thoroughly vetted, this orchestration layer itself is fresh code. Please do not drop this into production environments where you cannot afford implementation bugs. Instead, I am treating this as an architectural blueprint and an open invitation for collaboration. If you love Python architecture or applied cryptography, I would highly value your feedback on the repository. Specifically: Check out the code, open an issue, or rip the architecture apart in the comments below 📦 GitHub Repository: keerthivasan-sankar/crypto flex https://github.com python security architecture showdev