Root certificates are self-signed and form the basis of an X.509-based public key infrastructure (PKI). Ein digitales Zertifikat dient dazu, einen bestimmten ffentlichen Schl ssel einer Person oder Organisation zuzuordnen. Certificate authority - DNS Certification Authority Authorization (CAA) is an Internet security policy mechanism which allows domain name holders to indicate to certificate authorities whether they are authorized to issue digital certificates for a particular domain name. However, they do not provide all of the security properties that certificates signed by a CA aim to provide. Para CA merupakan contoh pihak-pihak yang dapat dipercayai, khususnya dalam transaksi secara online di Internet).
Self-signed certificate - In cryptography and computer security, a self-signed certificate is a certificate that is not signed by a certificate authority (CA). These certificates are easy to make and do not cost money.
Certificate authority - In crittografia, una Certificate Authority, o Certification Authority (acronimo: CA in italiano: Autorit Certificativa un soggetto terzo di fiducia (trusted third part pubblico o privato, abilitato ad emettere un certificato digitale tramite una procedura di certificazione che segue standard internazionali e in conformit alla).