Personalized CAPTCHA Using Cognitive Cryptography

Abstract

Cognitive Cryptography is used to improve personal verification process using the individual’s characteristics. The personal information contained can be biometrics because it is the unique information that identifies the owner. In advanced cryptographic protocol oriented for authentication of user, there is a possibility of using personal characteristics and perception abilities are required to create a new authentication procedure. This paper presents a new approach for creation of advanced multilevel user authentication protocol by using Image grid CAPTCHA codes. Here the user needs the special skills or knowledge while verifying, this is because of cognitive CAPTCHA’s. Instead of generating some random numbers or text while authentication procedure these CAPTCHA’s can be used. In multilevel authentication code the user verification can be realized in several iterations, in which the user attention can be oriented on different visual elements, region of interest or semantic content. This cognitive code will able to identify the recognition abilities of the user. Cognitive codes are having high security feature similar to traditional CAPTCHA’s because of understanding or recognizing the blurred or distorted patterns and also requires background knowledge to experience the connection with evaluated patterns. This feature guarantees the high level of security and allows to get succeeded in authentication process because the user possess specific skill that or not available for computers or answering systems. The traditional authentication protocols are to be involved with human mental capability is the vital idea of the proposed solution.