Graphical passwords are often considered prone to shoulder-surfing attacks, where
attackers can steal a user's password by peeking over his or her shoulder in the …

In mobile devices such as smart phones, it is important to provide adequate user
authentication. Conventional text-based passwords have significant drawbacks though they …

When users input their passwords in a public place, they may be at risk of attackers stealing
their password. An attacker can capture a password by direct observation or by recording …

Graphical password schemes are believed to be more secure and more resilient to
dictionary attacks than textual passwords, but more vulnerable to shoulder surfing attacks. In …

A potential drawback of graphical password schemes is that they are more vulnerable to
shoulder surfing than conventional alphanumeric text passwords. We present a variation of …

Information and computer security is supported largely by passwords which are the principle
part of the authentication process. The most common computer authentication method is to …

PassBYOP is a new graphical password scheme for public terminals that replaces the static
digital images typically used in graphical password systems with personalized physical …

Authentication based on passwords is used largely in applications for computer security and
privacy. However, human actions such as choosing bad passwords and inputting passwords …

The passwords for authenticating users are susceptible to shoulder-surfing attacks in which
attackers learn users' passwords through direct observations without any technical support …

In this paper, a new scheme that uses digraph substitution rules to conceal the mechanism
or activity required to derive password-images is proposed. In the proposed method, a user …