[PDF] Top 20 Captcha as Graphical Passwords Scheme for Authentication of Users

... user authentication methods are used for this ...of graphical password schemes built up on top of Captcha technology, which is known as Captcha as Graphical Password ... See full document

... of passwords is a major point of vulnerability in computer security, as passwords are often easy to guess by automated programs running dictionary ...attacks. Passwords remain the most widely used ... See full document

... animal scheme can be mixed with grid based graphical passwords, then its password space can be ...such authentication process, a Click Animal image is displayed first the grid can be made ... See full document

... of CAPTCHA is found in its strength in resisting automatic adversarial ...attacks. Captcha has many applications for practical ...the users or ... See full document

... of authentication so that many different types of attack can be avoided and ...of authentication where an user just need an username and password now user need to go through all three levels of security to ... See full document

... computer authentication way is used for a user to submit a user name and text ...recall passwords. Studies have shown that users be likely to select short passwords or passwords that ... See full document

... both Captcha and password in a user authentication protocol, which we call Captcha-based Password Authentication (CbPA) protocol, to counter online dictionary ...a Captcha challenge ... See full document

... the authentication server can verify ...user authentication, we noticed that human users enter passwords during authentication, whereas the trial and error process in guessing attacks ... See full document

... memorable passwords that are easy for attackers to guess, but strong system-assigned passwords are difficult for users to ...password authentication system should encourage strong ... See full document

... recall-based scheme user need to regenerate the same result with no ...recall-based scheme was Draw-A-Secret ...help users to create more complex passwords. In the cued-recall scheme to ... See full document

... Abstract— Graphical password is very strong password as compare to the text password and which is easily we can ...experimental graphical passwords schemes, their overall commercial adaptations have ... See full document

... Points scheme shows assure as an utilizable and memorable aut he ntica tion me c ha ni s m ...f users’ ability to identify images and the memory trigger related with seeing a new image, PCCP has advantages ... See full document

... letting users select a specific number of pictures among large images ...the authentication stage, the user should think a challenging set which his portfolio mixes with some decoy ... See full document

... The authentication server maps each user-clicked point on the image to find the closest clickable ...based graphical passwords or keys such as Pass Points ...traditional graphical password ... See full document

... based scheme to solve time synchronization problem and claimed that the scheme has an additional merit of session key ...this scheme is weak against insider attack and user is not allowed to change ... See full document

... text-based passwords, well known users often create memorable passwords that are easy for attackers to guess, but strong system-assigned passwords are difficult for users to ...easy ... See full document

... computer authentication plays an important role in identifying an ...in authentication is that, the process of authentication is supposed to simple for the users, while it provides high ... See full document

... information, passwords were ...popular authentication method used from ancient ...based passwords are prone to various intrusion such as guessing attacks, dictionary attacks, brute force attacks, ... See full document

... creation users may shuffle as often as desired but it slows the process of password creation, it can take many clicks to shuffle view port on user wanted area which leads to increase in password creation ...area ... See full document

... new scheme is also presented. Hotspots (i.e. areas of image that users have to select) are a concern in click-based passwords, so CCP uses a large set of images that will be difficult for attackers ... See full document