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Primary Key
A specific key from the set of candidate keys that is used as the main differentiator between records. Every record must have a unique value in its primary key field. An attribute that contains values that uniquely identifies the record in which the key exists.
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A subset of attributes, columns, or fields that can be used to uniquely identify any record in a table.
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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.
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Attribute of an information system when it performs its intended function in an unimpaired manner, free from deliberate or inadvertent unauthorized manipulation of the system. The attribute of an IS when it performs its intended function in an unimpaired manner, free from deliberate or inadvertent unauthorized manipulation of the system.
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A confinement technique in which an attribute called a domain is associated with each subject and another attribute called a type is associated with each object. A matrix specifies whether a particular mode of access to objects of a type is granted or denied to subjects in a domain.
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A basic unit of data, usually part of a record that is located on an input, storage, or output microfilm. In a database, a field is a column or attribute of a table.
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