SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols used to ensure secure data communication. These protocols provide security measures such as encryption, authentication, and data integrity during data transmission. They are used to secure communication over the internet. The relationship between SSL and TLS is as follows: TLS is an updated and more secure version of the SSL protocol. SSL has been developed over time due to the emergence of security vulnerabilities and is no longer recommended. TLS has replaced SSL and is a more modern, secure, and supported protocol.