This document introduces Digital Certificates and answers questions you might have about how Digital Certificates are used. For information about the cryptographic technologies used in Digital Certificates.

What is a Digital Certificate?
Digital Certificates are the electronic counterparts to driver licenses, passports and membership cards. You can present a Digital Certificate electronically to prove your identity or your right to access information or services online.
Digital Certificates, also known as digital certificates, bind an identity to a pair of electronic keys that can be used to encrypt and sign digital information. A Digital Certificate makes it possible to verify someone's claim that they have the right to use a given key, helping to prevent people from using phony keys to impersonate other users. Used in conjunction with encryption, Digital Certificates provide a more complete security solution, assuring the identity of all parties involved in a transaction.
A Digital Certificate is issued by a Certification Authority (CA) and signed with the CA's private key.
A Digital Certificate typically contains the:

• Owner's public key
• Owner's name
• Expiration date of the public key
• Name of the issuer (the CA that issued the Digital Certificate
• Serial number of the Digital Certificate
• Digital signature of the issuer

The most widely accepted format for Digital Certificates is defined by the CCITT X.509 international standard; thus certificates can be read or written by any application complying with X.509. Further refinements are found in the PKCS standards and the PEM standard.