Delayed password disclosure
by Markus Jakobsson, Steven Myers
International Journal of Applied Cryptography (IJACT), Vol. 1, No. 1, 2008

Abstract: We present a new authentication protocol called Delayed Password Disclosure (DPD). Based on the traditional username and password paradigm, the protocol's goal is aimed at reducing the effectiveness of phishing/spoofing attacks that are becoming increasingly problematic for Internet users. This is done by providing the user with dynamic feedback while password entry occurs. While this is a process that would normally be frowned upon by the cryptographic community, we argue that it may result in more effective security than that offered by currently proposed 'cryptographically acceptable' alternatives. While the protocol cannot prevent partial disclosure of one's password to the phisher, it does provide a user with the tools necessary to recognise an ongoing phishing attack, and prevent the disclosure of his/her entire password, providing graceful security degradation.

Online publication date: Wed, 06-Feb-2008

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