The underlying issues relating to the usability and security of multiple passwords are largely
unexplored. However, we know that people generally have difficulty remembering multiple …

Abstract Design of the user interface for authentication systems influences users and may
encourage either secure or insecure behaviour. Using data from four different but closely …

Click based graphical passwords that use background images suffer from hot-spot problem.
Previous graphical password schemes based on recognition of images do not have a …

" Humans are incapable of securely storing high-quality cryptographic keys, and they have
unacceptable speed and accuracy when performing cryptographic operations.(They are …

Numerous graphical password schemes have recently been proposed as alternatives to
traditional text password authentication. We provide a comprehensive overview of published …

Today, most Internet applications still establish user authentication with traditional text based
passwords. Designing a secure as well as a user-friendly password-based method has …

Botnets, networks of compromised machines remotely controlled and instructed to work in a
coordinated fashion, have had an epidemic diffusion over the Internet and represent one of …

We propose and evaluate the usability and security of Click to Zoom-inside (CTZ); a new
graphical password authentication mechanism. Users have to click six times on one point in …

Passwords play a critical role in online authentication. Unfortunately, passwords suffer from
two seemingly intractable problems: password cracking and password theft. In this paper …

Click based graphical password systems, such as PassPoint [1], have received much
attention in recent years. In this paper we describe our recent user studies on click based …