ABSTRACT
User authentication is a critical component of data security. A password is a key that is used to verify user identity. The most frequent and commonly used method of user authentication is text-based passwords. The alphanumeric modes of authentication, on the other hand, have a number of drawbacks. For example, it is predictable and memorable easily. Passwords that are difficult to remember are often forgotten. Passwords that are hard to know or break, on the other hand, are typically harder to recall. Because users can only remember a limited number of passwords, research shows that individuals tend to write passwords down or reuse passwords throughout many accounts. These drawbacks are the main reason for the introduction of graphical passwords. Humans can remember and recall images easily rather than text-based passwords. This paper reviews the graphical password authentication systems in terms of usability and security measures.
