Is Your Browser Quantum-Safe?
Modern browsers rely on TLS to protect your data—but quantum computers threaten to break today’s encryption. Learn how to check if your browser supports post-quantum security.
Quantum computers are coming—and they're a real threat to the way we protect information online today. Most websites use TLS (Transport Layer Security) to secure your data—think passwords, credit cards, or private messages—from prying eyes. TLS is essential because it encrypts your data and ensures you're communicating with the specified website, not an attacker.
The problem? Today's TLS encryption methods, like RSA and ECC, could soon be broken by quantum computers, meaning that everything you do, say, and send online could be exposed. Even more worrying: attackers can start collecting encrypted data today and decrypt it later, once quantum computers become powerful enough—a concept called “harvest now decrypt later”. This means data you consider safe today might be vulnerable in the future.
That's where Post-Quantum TLS (PQ-TLS) comes in. PQ-TLS combines current encryption methods with new algorithms designed specifically to withstand quantum attacks, and the good news is that browsers are beginning to support these quantum-safe methods.
At Project Eleven, we've made it easy for you to quickly check whether your browser supports PQ-TLS:
- When you visit our site, your browser sends a standard HTTPS request to our secure server.
- Our server instantly checks if your browser can handle quantum-safe encryption by checking the “client hello” message. Specifically, it checks whether your browser supports one of the following post-quantum key sharing methods:
- X25519MLKEM768
- secp256r1MLKEM768
- MLKEM512
- MLKEM768
- MLKEM1024
- You immediately learn if your browsing is quantum secure.
A quantum safe browser is only half the battle, web servers must also upgrade to support PQ-TLS on their side. This is being led by companies like Cloudflare.
Checking now matters because it helps you stay ahead of future threats. Quantum-safe browsers, paired with quantum-safe servers, are essential to ensure your private information stays protected—today and tomorrow.
Visit our website to see if your browser is quantum-ready: https://projecteleven.com.
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