Simple Tools Can Reveal Whether a Website Is Vulnerable to Quantum Attacks

A practical guide published on DEV Community explains how anyone with basic computer skills can assess a website's vulnerability to quantum computing threats in under 20 minutes. The tutorial focuses on TLS encryption, the protocol behind secure HTTPS connections, which relies on key-exchange methods like RSA and ECDH that quantum computers are expected to break. Using only a web browser and a terminal, users can inspect certificate details or run a free scan via SSL Labs to identify which encryption algorithms a site uses. The guide clarifies that while symmetric encryption like AES will remain quantum-safe, public-key cryptography used in the initial handshake phase is the primary point of concern. The tutorial is intended to help non-experts understand and communicate quantum encryption risks as post-quantum cryptography standards begin rolling out.