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Learn about the roles, policies, procedures and standards of a public key infrastructure (PKI) that enables secure electronic communication and identity verification. A PKI consists of a certificate authority (CA), a registration authority (RA), a central directory, a certificate management system and a certificate policy.
A domain-validated certificate (DV) is a public key certificate used for TLS that verifies the domain name of the applicant. Learn about the issuing criteria, user interface and characteristics of DV certificates.
Learn how DSA works as a public-key cryptosystem for digital signatures, based on modular exponentiation and discrete logarithm problem. See the key generation, signing and verification operations, and the history and specification of DSA.
Learn how to access and print your Restaurant.com certificates from your desktop computer or mobile app. Find out how to exchange your certificates and manage your account.
Seeing security certificate errors when visiting certain websites? Learn how to remedy this issue in Internet Explorer.
RFC 5280 defines a standardized path validation algorithm for X.509 certificates, given a certificate path. The algorithm checks various constraints and conditions for each certificate in the path, such as validity period, revocation status, name constraints, policy OIDs, and key usage.
Sign in and go to the AOL Account security page. Under "2-Step Verification," click Turn on. Click Security Key. Follow the onscreen steps to add your Security Key. Add additional recovery methods in case your Security Key is lost.
A wildcard certificate is a public key certificate that uses an asterisk (*) in its domain name fragment to secure multiple subdomains. Learn how wildcard certificates work, their advantages and limitations, and how they differ from other types of certificates.