TLSprotokolli

TLSprotokolli, also known as Transport Layer Security protocol, is a cryptographic protocol designed to provide communications security over a computer network. It is the successor to the Secure Sockets Layer (SSL) protocol. TLS encrypts the data transmitted between a client and a server, ensuring its confidentiality and integrity. This means that even if the data is intercepted, it cannot be read or tampered with by unauthorized parties.

The primary functions of TLS are authentication, encryption, and data integrity. Authentication verifies the identity of the server and, optionally, the client, preventing man-in-the-middle attacks. Encryption scrambles the data, making it unreadable to anyone without the correct decryption key. Data integrity ensures that the transmitted data has not been altered during transit.

TLS operates at the transport layer of the TCP/IP model. It works by establishing a secure connection through a handshake process. During the handshake, the client and server negotiate encryption algorithms and exchange security keys. Once the handshake is complete, all subsequent data exchanged between them is encrypted.

TLS is widely used to secure various internet communications, including web browsing (HTTPS), email (SMTPS, IMAPS, POP3S), and instant messaging. It is crucial for protecting sensitive information such as login credentials, financial details, and personal data. The protocol is maintained by the Internet Engineering Task Force (IETF) and has undergone several versions, with TLS 1.3 being the latest and most secure.