IMAGE-BASED MULTI-LEVEL USER AUTHENTICATION MECHANISM FOR SECURING UNAUTHORIZED DATA ACCESS IN PUBLIC CLOUD ENVIRONMENT

Authentication is one of the most important processes required to access safe and private data in the cloud environment. Authentication of users is usually followed through text-based passwords. Attackers uses some existing techniques easily obtain the text based password of a user. Text based passwords are secure-but-difficult-toremember, Nowadays used some other methods where in images are used as passwords. Image based authentication allows user to create multilevel user authentication techniques has more advantages over text-based passwords. Image based authentication password is memorable and very easier for persons to use. This paper is mainly concentrates on Image-based Multi-level User Authentication (IBMUA) to enhance authentication concerning the security of cloud users' data. Authentication deals with the identification of the user , creating a password by using a images and the four levels such as Traditional authentication ,identify image authentication ,odd one out image authentication, image mapping authentication, images are used during registration and login phase.