A convenient method for securely managing passwords
WWW '05 Proceedings of the 14th international conference on World Wide Web
Passpet: convenient password management and phishing protection
SOUPS '06 Proceedings of the second symposium on Usable privacy and security
Password management strategies for online accounts
SOUPS '06 Proceedings of the second symposium on Usable privacy and security
Stronger password authentication using browser extensions
SSYM'05 Proceedings of the 14th conference on USENIX Security Symposium - Volume 14
A usability study and critique of two password managers
USENIX-SS'06 Proceedings of the 15th conference on USENIX Security Symposium - Volume 15
Halting password puzzles: hard-to-break encryption from human-memorable keys
SS'07 Proceedings of 16th USENIX Security Symposium on USENIX Security Symposium
HOTSEC'08 Proceedings of the 3rd conference on Hot topics in security
So long, and no thanks for the externalities: the rational rejection of security advice by users
NSPW '09 Proceedings of the 2009 workshop on New security paradigms workshop
Authentication technologies for the blind or visually impaired
HotSec'09 Proceedings of the 4th USENIX conference on Hot topics in security
Proceedings of the 17th ACM conference on Computer and communications security
Kamouflage: loss-resistant password management
ESORICS'10 Proceedings of the 15th European conference on Research in computer security
A comparative usability evaluation of traditional password managers
ICISC'10 Proceedings of the 13th international conference on Information security and cryptology
Johnny in internet café: user study and exploration of password autocomplete in web browsers
Proceedings of the 7th ACM workshop on Digital identity management
Phoolproof phishing prevention
FC'06 Proceedings of the 10th international conference on Financial Cryptography and Data Security
SP'11 Proceedings of the 19th international conference on Security Protocols
The Science of Guessing: Analyzing an Anonymized Corpus of 70 Million Passwords
SP '12 Proceedings of the 2012 IEEE Symposium on Security and Privacy
The Quest to Replace Passwords: A Framework for Comparative Evaluation of Web Authentication Schemes
SP '12 Proceedings of the 2012 IEEE Symposium on Security and Privacy
Graphical passwords: Learning from the first twelve years
ACM Computing Surveys (CSUR)
A Research Agenda Acknowledging the Persistence of Passwords
IEEE Security and Privacy
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Passwords continue to prevail on the web as the primary method for user authentication despite their well-known security and usability drawbacks. Password managers offer some improvement without requiring server-side changes. In this paper, we evaluate the security of dual-possession authentication, an authentication approach offering encrypted storage of passwords and theft-resistance without the use of a master password. We further introduce Tapas, a concrete implementation of dual-possession authentication leveraging a desktop computer and a smartphone. Tapas requires no server-side changes to websites, no master password, and protects all the stored passwords in the event either the primary or secondary device (e.g., computer or phone) is stolen. To evaluate the viability of Tapas as an alternative to traditional password managers, we perform a 30 participant user study comparing Tapas to two configurations of Firefox's built-in password manager. We found users significantly preferred Tapas. We then improve Tapas by incorporating feedback from this study, and reevaluate it with an additional 10 participants.