Data flows. The wrong configuration leaks it. The right configuration keeps you compliant and secure. GDPR TLS configuration is the line between safe and exposed.
To meet GDPR, you must encrypt all personal data in transit. TLS is the standard. Misconfigure it, and you risk fines, breaches, and broken trust. Compliance here is not an option — it is a minimum requirement.
Start with TLS 1.2 or TLS 1.3. Older versions like SSLv3 and TLS 1.0 are banned under most security guidelines. Disable weak ciphers such as RC4, 3DES, and any with key lengths under 128 bits. Use AES-GCM or CHACHA20-POLY1305 for strong, forward-secure encryption. Ensure Perfect Forward Secrecy (PFS) by enabling ECDHE key exchange.
Configure your server to prefer secure ciphers over client-proposed weaker ones. Enable HSTS (HTTP Strict Transport Security) to force HTTPS connections. Validate your certificates with a trusted CA. Monitor for expiration and renew proactively. Check your server with tools like Qualys SSL Labs or Mozilla Observatory. Don’t just test once — revalidate after each change.