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3.5This application lets you generate One Time Passwords that are used for a more secure authentication (two-factor) - instead of having to enter a static password the iPhone plays the role as a "security token" that generates passwords that are valid only one time. The authentication mechanism is based on two factors: - the token device (i.e. mOTP-Application) and - a PIN Since the generated passwords are only valid for a very short time - it is of no use for a possible attacker. Moreover the passwords can only be generated with a hold of the PIN as well as the token device. Note: - the server you want to log onto also needs to implement the OTP-algorithm, you need to configure your "shared secret/PIN" there - the secret key is generated using random by shaking your iPhone :) - the algorithm uses MD5-hashing - compare this solution with "Mobile-OTP" Midlet solution on http://motp.sourceforge.net/- also free server components to be used e.g. as PAM can be found there. - the clocks of your iPhone and your Server have to be in sync - the algorithm can also be used for implementing a challenge-response authentication i.e. the PIN is not fixed but a random number is provided to you by the server at the login prompt.
