TLS and its precursor, Secure Socket Layer (SSL), are extensively used protocols. They were created to protect the data flow between the client and the server by using authentication, encryption, and integrity protection.
TLS/SSL technology, in conjunction with the HTTP protocol, is widely used in websites and web applications. Email (SMTP, POP, and IMAP protocols), FTP, chat (XMPP protocol), virtual private networks (TLS/SSL VPNs), and network appliances are all examples of how it is utilized.
TLS/SSL uses one or more cipher suites to protect data flow. A cipher suite is a collection of techniques for authentication, encryption, and message authentication code (MAC). They are used to negotiate security parameters for a TLS/SSL connection as well as to transfer data.
The algorithms listed below are samples of what a cipher suite may employ.
| Function | Algorithm |
|---|---|
| Key Exchange | RSA, Diffie-Hellman, ECDH, SRP, PSK |
| Authentication | RSA, DSA, ECDSA |
| Bulk Ciphers | RC4, 3DES, AES |
| Message Authentication | HMAC-SHA256, HMAC-SHA1, HMAC-MD5 |
TLS is currently required in a number of regulatory requirements. In the absence of TLS, major browsers flag sites as insecure. As a result, it may be seen as a prerequisite for providing web pages and online applications. Obtaining a proper TLS implementation, on the other hand, maybe tricky. Bad TLS setups can give the impression of security while making websites and online apps vulnerable to attacks.
Choosing the incorrect cipher suites is the root cause of many typical TLS misconfigurations. Old or out-of-date encryption suites are frequently vulnerable to attack. When you utilize them, the attacker has the ability to intercept or change data in transit. A list of guidelines for a secure SSL/TLS implementation is provided below.
You may need to utilize somewhat different cipher suite configurations depending on your business use case (for example, the necessity to support legacy browsers and regulatory requirements). To obtain an appropriate TLS setup using multiple browser profiles, utilize the Mozilla SSL Configuration Generator (modern, intermediate, or old).
How to Verify the Configuration?
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