Privacy Concerns of Implicit Secondary Factors for Web Authentication
Authors: Joseph Bonneau, Edward W. Felten, Prateek Mittal, Arvind Narayanan

Date: July 2014
Publication: Symposium on Usable Privacy and Security (SOUPS) 2014
Publisher: SOUPS
Source 1:

Abstract or Summary:
Passwords remain the dominant mechanism for web authentication despite their well-known weaknesses. Economics makes them very difficult to replace, but they can be strengthened by analyzing a number of implicit secondary factors. These implicit factors can help transform authentication from a binary decision problem (based on passwords alone) into a classification problem with a spectrum of possible decisions.

We highlight three distinct privacy issues in the next three sections.

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