Sat. Jan 21st, 2023

Digital Certificates

Digital certificates are used to guarantee the ownership of some resource. The specific case we are looking at is the issuance of certificates for web sites.

When visiting a website, by default, the HTTP protocol is used for data exchange between client and server. This is problematic, as many websites require confidential information to be entered: for example, credentials or payment details. In these cases, HTTPS is used.

Certificates are used on HTTPS websites in order to identify the server: it is easy to duplicate a website and use a URL similar to the real one. However, in order to get a certificate, a certification authority must verify the identity of the client. This means a website certificate can show who the owner is, and this information can be trusted.

Certificates are issued by Certification Authorities (CAs) – for example, Verisign. For more detail, read here: Verisign is a global provider of domain name registry services and internet infrastructure – Verisign