[Auth] authenticity

Assurance of identity or origin.

What would be the importance of the person accessing the service not being the real one?

The authenticity of the users of a service counters the opportunity for fraud or unauthorised use of a service.

Consequently, a service is attributed a high value from the point of view of authenticity when its provision to false users would cause serious prejudice for the organisation.

Likewise, a service lacks appreciable value from the authenticity point of view when its access by anyone is of no concern.

What would be the importance of the data not really originating from where they are thought to?

Data are attributed a high value from the point of view of origin authenticity when an imputation defect would cause serious damage to the organisation. Typically, the opportunity for repudiation is given.

Likewise, data have little appreciable value from the point of view of origin authenticity when not knowing the source is irrelevant.