Hypertext Transfer Protocol Secure (HTTPS) extends HTTP, the communication layer for the web. Websites that use HTTPS are safer. HTTPS secures Internet traffic with encryption, ensuring that both client and server communication remains private to outsiders. HTTPS significantly reduces the risk of data being intercepted while in transit, commonly referred to by security experts as "man-in-the-middle" attacks. HTTPS uses Transport Layer Security (TLS) to cryptographically secure data.