We propose a new construct, the Text-Graphics Character (TGC) CAPTCHA, for preventing
dictionary attacks against password authenticated systems allowing remote access via …

We propose a new construct, the Text-Graphics Character (TGC) CAPTCHA, for preventing
dictionary attacks against password authentication systems allowing remote access via …

Text-based password schemes have inherent security and usability problems, leading to the
development of graphical password schemes. However, most of these alternate schemes …

When we consider the online service or desktop application there is major issue of security
breaching. Old password schemes has some drawbacks like hacking of password, shoulder …

In last 20 years, the Internet and mobile communication growth in parallel. There are many
sites specially designed for mobile phones that users must enter username and password to …

In recent years, the number of personal accounts assigned to a single user has considerably
increased. According recent study, the average employee had above 190 individual login …

CAPTCHAs, also known as reverse Turing tests are real-time assessments that are
commonly used by programs to tell humans and machines apart. This can be achieved by …

Nowadays, many daily human activities such as education, commerce, talks, etc. are carried
out through the Internet. In cases such as the registering in Web sites, some hackers write …

This research aims to study the existing password schemes and to design and develop a
new improved graphical password scheme. CaRP is Captcha as a graphical password. With …

The security and usability problems inherent in text-based password schemes have resulted
in the development of graphical password schemes as a possible alternative. However …