Is Your Website Quantum-Safe?

Test any domain for Post-Quantum Cryptography (PQC) support in seconds

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Results in seconds
Accurate
OpenSSL-based detection
Check PQC Support

Enter any domain name (e.g., google.com, cloudflare.com)

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Analyzing TLS handshake, cryptographic algorithms, and checking for downgrade vulnerabilities...

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What is Post-Quantum Cryptography?

Post-Quantum Cryptography (PQC) refers to cryptographic algorithms designed to be secure against attacks from both classical and quantum computers.

Traditional encryption methods like RSA and ECC can be broken by sufficiently powerful quantum computers using algorithms like Shor's algorithm.

Why This Matters Now

Quantum computers capable of breaking current encryption could emerge within years. The threat is immediate due to "Harvest Now, Decrypt Later" attacks.

Organizations worldwide are mandated to transition to PQC by regulatory bodies including NIST, NSA, and EU cybersecurity agencies.

How This Tool Works

1
TLS Handshake
Initiates a secure connection to your domain
2
Algorithm Analysis
Identifies key exchange algorithms and cipher suites
3
PQC Detection
Checks for NIST-approved quantum-resistant algorithms
4
Downgrade Check
Tests for vulnerable older TLS versions

This tool uses OpenSSL to perform accurate detection of PQC support including ML-KEM (formerly Kyber) key exchange mechanisms standardized by NIST in 2024.

Important: A domain is only fully quantum-safe if it supports PQC and blocks older TLS versions (1.0, 1.1, 1.2). Allowing older protocols enables downgrade attacks where attackers force vulnerable connections.

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