Guidelines and Strategies for Secure Interaction Design

To give you a sense of how important it is to look beyond authentication, consider some of today’s most serious security problems. Viruses are a leading contender, with email viruses making up a large part. Spyware is growing into a nightmare for home users and IT staff. Identity theft is becoming widespread, perpetrated in part through “phishing” scams in which forged email messages entice people to give away private information. None of these problems is caused by defeating a login mechanism. They would be better described as failures of computers to behave as their users expect.