Easily remembered passphrases: a better approach

As lay persons' use of information processing equipment increases, systems' accurate verification of a user's identity becomes a matter of growing concern. Prime considerations are:1. People must be prevented from convincing the system that they are someone else.2. The system must properly accept persons' accurate statements of their identities.3. Verification procedures must impose a minimal burden on lay users.4. Costs of verification must be reasonable. [9, 10, 11, 13, 19]