View source for X.509 public key certificate

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{{CyberTerm|definition=The public key for a user (or device) and a name for the user (or device), together with some other information, rendered unforgeable by the digital signature of the certification authority that issued the certificate, encoded in the format defined in the ISO/ITU-T X.509 standard. 
Also known as X.509 Certificate.|source=CNSSI 4009-2015}}