🔒 TLS Version Checker
⚡ Output
ℹ️ About TLS Version Checker
The TLS Version Checker is a security auditing tool that reveals the specific encryption parameters used by a server. Transport Layer Security (TLS) has evolved through several versions (1.0, 1.1, 1.2, and 1.3). Older versions like TLS 1.0 and 1.1 are now considered insecure and have been deprecated by major browsers.
This tool identifies the negotiated protocol and the cipher suite used for the connection. This is essential for ensuring your server meets modern security standards (like PCI-DSS) and for troubleshooting connection issues with older clients that might not support newer, stronger encryption methods.
📖 How to use TLS Version Checker
- 1. Enter the domain name of the server you wish to audit.
- 2. Click 'Run Tool' to perform a security handshake.
- 3. Review the 'Negotiated Protocol' (TLSv1.3 is the modern standard) and the 'Cipher Suite'.
❓ Frequently Asked Questions
What is the most secure version?
TLS 1.3 is the current state-of-the-art protocol. It is faster and more secure than previous versions by removing legacy features and streamlining the handshake process.
Why does my server show TLS 1.2?
TLS 1.2 is still considered secure and is the most widely compatible protocol in use today. Many systems support both 1.2 and 1.3.
What are 'Ciphers'?
Ciphers are the specific mathematical algorithms used to encrypt the data. A suite includes algorithms for the handshake, the encryption, and the data integrity check.
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