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Certificate and certificate authorities (CAs) 

 

A certificate is a valid copy of a public key of an individual 

or organisation together with identification information. 

It is issued by a trusted third party (TTP) or certificate 

authority (CA). CAs make public keys available and also 

issue private keys.

Change agents 

Managers involved in controlling 

change transitions.

Change management 

Managing process, structural, 

technical, staff and culture change within an organisation.

Changeover 

The term used to describe moving from 

the old information system to the new information 

system.