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This is an example of a decoded SSL/TLS certificate retrieved from SSL.com's website. The issuer's common name (CN) is shown as SSL.com EV SSL Intermediate CA RSA R3, identifying this as an Extended Validation (EV) certificate. Validated information about the website's owner (SSL Corp) is located in the Subject field.
In cryptography, X.509 is an International Telecommunication Union (ITU) standard defining the format of public key certificates. [1] X.509 certificates are used in many Internet protocols, including TLS/SSL, which is the basis for HTTPS, [2] the secure protocol for browsing the web.
This is an accepted version of this page This is the latest accepted revision, reviewed on 24 January 2025. Extension of the HTTP communications protocol to support TLS encryption Internet protocol suite Application layer BGP DHCP (v6) DNS FTP HTTP (HTTP/3) HTTPS IMAP IRC LDAP MGCP MQTT NNTP NTP OSPF POP PTP ONC/RPC RTP RTSP RIP SIP SMTP SNMP SSH Telnet TLS/SSL XMPP more... Transport layer TCP ...
This is an example of a decoded EV code signing certificate used by SSL.com to sign software. SSL.com EV Code Signing Intermediate CA RSA R3 is shown as the Issuer's commonName, identifying this as an EV code signing certificate. The certificate's Subject field describes SSL Corp as an organization.
A domain validated certificate (DV) is an X.509 public key certificate typically used for Transport Layer Security (TLS) where the domain name of the applicant is validated by proving some control over a DNS domain. [1] Domain validated certificates were first distributed by GeoTrust in 2002 before becoming a widely accepted method. [2]
The third set combine public key authentication of the server with pre-shared key authentication of the client. Usually, Transport Layer Security (TLS) uses public key certificates or Kerberos for authentication. TLS-PSK uses symmetric keys, shared in advance among the communicating parties, to establish a TLS connection.
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Some strong authentication protocols for web-based applications that are occasionally used include: Public key authentication (usually implemented with a HTTPS / SSL client certificate) using a client certificate. Kerberos or SPNEGO authentication, employed for example by Microsoft IIS running configured for Integrated Windows Authentication (IWA).