Any advanced technology creates new threats as well as new potentials. The
Internet offers enormous opportunties, which are being exploited by
communities, and increasingly also by business enterprises. It also harbours
risks to the privacy of personal data and communications, as marketers seek to
profile their electronic customers, and governments seek to impose themselves
on people they see as miscreants. This paper describes the kinds of threats
that exist and are emerging. It also outlines measures, both fair and foul,
that are being adopted to counter those threats.