The certificate contains the name of the certified entity, the serial number, expiration date and a copy of the public key of the certificate holder actually used in the association. The Certification Authority, either by itself or through the intervention of a registration authority verifies the identity of applicants for a certificate before being issued or, if issued certificates revoked status eliminates the revocation of licenses to verify that identity. his. Certificates are documents showing certain details of its proprietor and its public key and are digitally signed by the CA using its private key. The Certification Authority is a particular type of Certification Service Provider that legitimizes, to third parties who rely on their certificates, the relationship between a user's identity and public key. The confidence of users in the Certification Authority is important for the operation of the service and justify the philosophy of their job but there is no standard procedure to show that a Certification Authority, deserves that trust.
The "public key" and " private key "Asymmetric cryptography is a cryptographic method that uses a pair of keys for sending messages. The two keys belong to the same person who sent the message. One key is public and can be given to anyone The other key is private and the owner must keep it so that nobody has access to it. In addition, methods guarantee cryptographic key pair that can be generated only once, so you can assume it is not possible for two happened to have obtained the same key pair.