SSL Fundamentals

There are 3 essential elements at work in the process described above: a protocol for communications (SSL), credentials for establishing identity (the SSL certificate), and a third party that vouches for the credentials (the certificate authority).

  • Computers use protocols to allow different systems to work together. Web servers and web browsers rely on the Secure Sockets Layer (SSL) protocol to enable encrypted communications. The browser’s request that the server identify itself is a function of the SSL protocol.
  • Credentials for establishing identity are common to our everyday lives: a driver’s license, a passport, a company badge. An SSL certificate is a type of digital certificate that serves as a credential in the online world. Each SSL certificate uniquely identifies a specific domain and a web server.
  • Our trust of a credential depends on our confidence in the organization that issued it. Certificate authorities have a variety of methods to verify information provided by individuals or organizations. Established certificate authorities are well known and trusted by browser vendors. Browsers extend that trust to digital certificates that are verified by the certificate authority.

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