AUTHENTICATION FRAMEWORK USING VISUAL CRYPTOGRAPHY

Megha Goel, Vaishali Bhagat, Veena Katankar

Abstract: Now a days, when we login in the website for eg. yahoo.com, gmail.com and filpkart.com we have to enter the username & password. But password is in the form of text & many users create password by combining various personal details so it is possible to forge that password. This paper proposed a new approach for providing secured authentication using visual cryptography & stenography. In the proposed work, first user has to select one cover image (secret image). Then user has to create one secret question & also has to provide the answer of that secret question. The answer of that question is hiding in the cover image (using steganography) which is selected by the user. Then we will create the shares of this cover image through visual cryptography. The process of share generation is done at the server, during this process two shares are generated & one share is given to the user & another is stored in the server. During transmission if attack is performed on the share than it is not possible to recover any information from the single share. When the user want to login, user has to provide the username & in place of password, user has to upload the share, which is provided to him/her after the registration, than at the server side both share are superimposed, one which is provided to the user & another which is stored in the server, this superimposing or stacking will reveal the cover image (secret image). From this cover image we will extract the answer of secret question. Then we will ask the user to answer the secret question & in the last we will match both answer of secret question, one which is provided by the user & another which is extracted from the cover image, if both answer are matched than only we will authenticate the user otherwise not

Keywords: Visual Cryptography, Stenography, Authentication

DOI: https://doi.org/10.15623/ijret.2013.0211041