Also known as: RA#, RA...
RA has various meanings in the Security category. Discover the full forms, definitions, and usage contexts of RA in Security.
A registration authority (RA) is an authority in a network that verifies user requests for a digital certificate and tells the certificate authority (CA) to issue it. RAs are part of a public key infrastructure (PKI), a networked system that enables companies and users to exchange information and money safely and securely. The digital certificate contains a public key that is used to encrypt and decrypt messages and digital signatures.
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