An Integrated Authentication Mechanism for Internet/Intranet Services

Paper ID: EIJTEM_2016_3_1_52-55

Author's Name: B. Jaya Prakash, K.V. Kamalambigai, S. Keerthi, R. Mohana Priya and C. Sharmila

Volume: 3

Issue: 1

Year: 2016

Page No: 52-55

Abstract:

Network services are provided with user verification methods. Client connectivity is verified with user account information and passwords. Textual passwords are not secure because of the guessing attacks. The graphical password schemes are used to verify the users. Captcha schemes are applied to verify the request is raised from the user or machine. The Captcha and graphical passwords are integrated to verify the user accounts. Captcha as graphical passwords (CaRP) is a graphical password scheme used for user authentication. Online guessing attacks, relay attacks and shoulder surfing attacks are handled in CaRP. CaRP is clickbased graphical passwords where a sequence of clicks on an image is used to derive a password. Dynamic captcha challenge image is used for each login attempt in CaRP. Text Captcha and image-recognition Captcha are used in CaRP scheme. Text CaRP scheme constructs the password by clicking the right character sequence on CaRP images. CaRP schemes can be classified into two categories recognition based CaRP and recognition-recall based CaRP. Recognitionbased CaRP seems to have access to an infinite number of different visual objects. Recognition-recall based CaRP requires recognizing an image and using the recognized objects as cues to enter a password. Recognition-recall combines the tasks of both recognition and cued-recall. Password information is transferred and verified using hash codes. Secure channels between clients and the authentication server through Transport Layer Security (TLS). Password strength verification mechanism is integrated with the CaRP scheme. Pattern based attacks are handled with Color and Spatial patterns. Pixel colors in click points are considered in the color pattern analysis model. Pixel location patterns are considered in the spatial pattern analysis model

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