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Certificate authority (CA)

A trusted third party that associates a public key with proof of identity by producing a digitally signed certificate. A CA provides to users a digital certificate that links the public key with some assertion about the user, such as identity, credit payment card number etc. Certification authorities may offer other services such as timestamping, key management services, and certificate revocation services. It can also be defined as an independent trusted source that attests to some factual element of information for the purposes of certifying information in the electronic environment. An agency that authenticates and distributes digital certificates.

Similar items:
A set of information that at least: identifies the certification authority issuing the certificate; unambiguously names or identifies its owner; contains the owner’s public key and is digitally signed by the certification authority issuing it. Digitally signed document that binds a public key with an identity. The certificate contains, at a minimum, the identity of the issuing Certification Authority, the user identification information, and the user’s public key. Endorsed copy of an individual’s public key that verifies their identity.
A security protocol for the transmission of transactions over the Internet. SET is based on RSA encryption and DES. SET had the support of major credit card companies, such as Visa and MasterCard. However, it has mostly been abandoned in light of newer and more secure alternatives. The SET specification has been developed to allow for secure credit card and offline debit card (check card) transactions over the World Wide Web.
(C&A) Official responsible for performing the comprehensive evaluation of the security features of an information system and determining the degree to which it meets its security requirements. (PKI) Trusted entity authorized to create, sign, and issue public key certificates. By digitally signing each certificate issued, the user’s identity is certified, and the association of the certified identity with a public key is validated.
A network or systems in which, at the extremes, unknown parties, possibly in a different state or national jurisdictions will exchange/trade data. To do this, will require an overarching framework which will engender trust and certainty. A user of online services might go through a single authentication process with a trusted third party, receive certification of their public key, and then be able to enter into electronic transactions/data exchanges with merchants, governments, banks etc. , using the certificate so provided for multiple purposes.
An entity trusted by other entities with respect to security related services and activities, such as a certification authority.

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