This difference is . . . Because they simply appear when the browser comes up, they are much more like broadcast with a fixed content. The three basic criteria of on-line security are . . . Integrity indicates the error-free receipt of the message as sent. There are elaborate transmission protocols used to check for and correct transmissive errors.
Authenticity speaks to the identity of message source and receiver - are they who they say they are.
All can be viewed efficiently by looking at the subheadings in Banbury's article . Essentially, telepresence is when one is so engrossed in the web that intellectually one is virtually present in the website participating in its activities rather than being external to it. From Everett Roger's work on technology transfer and diffusion of innovations, relative advantage means the ratio of benefits gained from the product or change against the costs in both economic and intellectual terms. Once an obscure term in economics, disintermediation has roared out of the closet with the Internet. The term means that intermediate stages of distribution between factory or source and end-consumer are reduced or eliminated.