Optiv Cybersecurity Dictionary

What is SSL/TLS (Secure Sockets Layer/ Transport Layer Security)?

Secure Sockets Layer (SSL), the most widely used cryptography protocol in internet history, was designed to provide communications security over a computer network. SSL was developed by Netscape in the mid-1990s, and was upgraded in 1999 to a more secure version called TLS (Transport Layer Security). The technology continues to evolve and harden with successive versions since then.


SSL/TLS establishes the trust required to support all kinds of online communication, including the transmission of confidential data like credit card numbers, sensitive IP, social security numbers and other personally identifiable information.

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