Communication Data:
What is it?
·the form of the communication (eg email, request for webpage, ‘authenticating’ your username and password)
·where it came from
·where it is going to
·When it was sent
·how long it took to transmit.
·It does not contain a message (content) but could, when ‘data- based’ with the communications data of others, provide an  accurate profile of a person's life choices, political, recreational and social activities, and the network of contacts or friends with whom they carry out these activities.