Also known as: RA#, RA...
RA has various meanings in the Technology category. Discover the full forms, definitions, and usage contexts of RA in Technology.
The height of an aircraft above terrain immediately below the it taken from a Radio Altimeter.
TechnologyA 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.
TechnologyAny part of an installation accessible to employees in which there exists a radiation level of 7.5 millirem in any one hour over 150 millirem in any seven consecutive days. Any area with radiation levels greater than 5 millirems (0.05 millisievert) in one hour at 30 centimeters from the source or from any surface through which the radiation penetrates.
TechnologyPermission to read information in an information system.
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