A method and a corresponding device for authenticating a user for access to protected information, the method comprising generating a behavioral user profile associated with a first user known to be a legitimate user of the protected information, obtaining from a second user, using a behavioral input device associated with a second computing device, a behavioral user sample, storing the behavioral user sample, associated with the second user, in a temporary user profile, comparing the behavioral user sample of the second user to the behavioral user profile, and if the behavioral user sample does not match the behavioral user profile contacting the legitimate first user and receiving from the legitimate first user information regarding the legitimacy of the second user and based on the information received from the first user, providing a response to the second user and updating the user profile.
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