What is a public key certificate?

The public key certificate is a cryptographic document used to verify the identity of the named party when communicating over the Internet or other network. These certificates usually consist of a digital signature of the certification body, the public key of the sender and other identification data that verify the identity of the sender to the recipient. Public key certificates are an established part of secure network and internet communications. A lively part of the public key certificate is the algorithm of the public key, the type of mathematical code. The public key algorithm enables encryption of data replaced between computers and at the same time ensures safe remote access to the user through interaction with private key. Encryp certificates of public keys now helps to provide privacy in communication, especially in sensitive e-mail correspondence and electronic trade. Important data such as the date issued and the expiration of the certificate, the encryption algorithm and the identification ofOd that shows the authenticity of the certificate. The certificates are issued for a limited period of time, must be restored once or several times a year and can be canceled if they guarantee the circumstances.

The

certification authority is responsible for issuing a public key certificate and may be a private, commercial or governmental nature. Private and commercial authorities usually charge for the issue of digital certifications that are accepted by most websites for web browsing. These entities take steps to protect against the handling of certificates and help maintain the confidentiality of the sensitive data held within the certificate. Although it is ultimately up to a user who visits the site to determine the security of communication, the certification authorities are obliged to verify the identity of those issued by public key certificates.

The most common use of the public key certificate is to interact with Internet sites. ComputerThe SIPER verifies the credentials of the sender's website, so the user has an authentic interaction with the subject's website and the security level. This type of certificate -based verification plays an important role in safe communication and electronic trade.