TLS / 443
Start with your domain.
A free live check. No account required.
EXPLORE AN EXAMPLE
No website of your own? Explore the examples above.
Your domain is sent to Quantum Aether. Results are stored on a public page.
THE POST-QUANTUM WEB OBSERVATORY
Encryption is changing. Know where you stand.
Start with a domain. Explore the evidence, understand the scope, and find your next step.
01Check a domain02Read the evidence03Choose your next step
Connection insight
ILLUSTRATIVE SAMPLESAMPLE GRADEAHybrid exchange observed
cloudflare.com
PROTOCOLTLS 1.3
KEY EXCHANGEX25519MLKEM768
MEASUREMENT SCOPEOne IPv4 · port 443
The grade includes certificate checks and key exchange; it is not a security guarantee.
DOMAINS IN PUBLISHED STUDY
1,000A defined research sample
RESPONDED OVER HTTPS
712Of all sampled domains
OBSERVED PQ ADOPTION
59.7%Among responding domains only
STUDY SNAPSHOT
03 NOV2026 · published study, not live telemetry
The global transition
Illustrative visualization · not live attacks or measurements
Illustrative nodesOpen tracker data
What do we measure?
04 CHECKS01
Key exchange
Observe the negotiated group
02
TLS protocol
Identify the observed version
03
Certificate
Validity, algorithm and key strength
04
Measurement limits
One vantage point; excludes origin behind CDN