All your face are belong to us: breaking Facebook's social authentication

  title={All your face are belong to us: breaking Facebook's social authentication},
  author={Iasonas Polakis and Marco Lancini and Georgios Kontaxis and Federico Maggi and Sotiris Ioannidis and Angelos D. Keromytis and Stefano Zanero},
Two-factor authentication is widely used by high-value services to prevent adversaries from compromising accounts using stolen credentials. Facebook has recently released a two-factor authentication mechanism, referred to as Social Authentication, which requires users to identify some of their friends in randomly selected photos. A recent study has provided a formal analysis of social authentication weaknesses against attackers inside the victim's social circles. In this paper, we extend the… CONTINUE READING
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