Turvasertifikaatit

Turvasertifikaatit, often translated as security certificates, are digital credentials used to verify the identity of a website or an individual and to encrypt communications. They are a fundamental component of internet security, particularly for secure data transmission. The most common type of turvasertifikaatti is the Transport Layer Security (TLS) certificate, formerly known as Secure Sockets Layer (SSL) certificate. These certificates enable the HTTPS protocol, which encrypts the data exchanged between a user's browser and a website's server.

When a user visits a website secured by a turvasertifikaatti, their browser checks the certificate's validity. This involves verifying that it was issued by a trusted Certificate Authority (CA), that it has not expired, and that it matches the domain name of the website. If the certificate is valid, the browser establishes a secure, encrypted connection, indicated by a padlock icon in the address bar. This encryption prevents eavesdropping and man-in-the-middle attacks, protecting sensitive information like login credentials and financial details.

Beyond TLS certificates, other types of turvasertifikaatit exist. Email certificates, for instance, can be used to digitally sign and encrypt emails, ensuring their authenticity and confidentiality. Code signing certificates are used by software developers to digitally sign their applications, assuring users that the software has not been tampered with since it was signed. The issuance and management of turvasertifikaatit are handled by trusted CAs, which adhere to strict industry standards and protocols.