SSLTLSsuojaus

SSLTLSsuojaus refers to the security protocols Secure Sockets Layer (SSL) and Transport Layer Security (TLS). These protocols are designed to encrypt communication between a client, such as a web browser, and a server. This encryption ensures that any data exchanged between the two remains private and protected from interception or tampering.

SSL was the original protocol, developed in the mid-1990s. Over time, vulnerabilities were discovered, leading to its deprecation. TLS is its successor, offering improved security features and a more robust encryption framework. While the term SSL is still commonly used, most modern secure connections actually utilize TLS.

The primary function of SSL/TLS is to establish a secure channel over an insecure network, like the internet. This is achieved through a handshake process where the client and server negotiate encryption algorithms, exchange security certificates to verify each other's identity, and generate unique session keys. Once the handshake is complete, all subsequent data transmission is encrypted.

Websites that use SSL/TLS typically display a padlock icon in the browser's address bar and the URL begins with "https://" instead of "http://". This indicates that the connection is secure and that sensitive information, such as login credentials or credit card details, is being transmitted securely. SSL/TLS is fundamental to online security, protecting against man-in-the-middle attacks and ensuring data integrity.