ACSAC '05 Proceedings of the 21st Annual Computer Security Applications Conference
Dictionary attacks using keyboard acoustic emanations
Proceedings of the 13th ACM conference on Computer and communications security
Déjà Vu: a user study using images for authentication
SSYM'00 Proceedings of the 9th conference on USENIX Security Symposium - Volume 9
The design and analysis of graphical passwords
SSYM'99 Proceedings of the 8th conference on USENIX Security Symposium - Volume 8
On predictive models and user-drawn graphical passwords
ACM Transactions on Information and System Security (TISSEC)
Developing usable CAPTCHAs for blind users
Proceedings of the 9th international ACM SIGACCESS conference on Computers and accessibility
Human-in-the-loop: rethinking security in mobile and pervasive systems
CHI '08 Extended Abstracts on Human Factors in Computing Systems
Evaluating existing audio CAPTCHAs and an interface optimized for non-visual use
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
TapSongs: tapping rhythm-based passwords on a single binary sensor
Proceedings of the 22nd annual ACM symposium on User interface software and technology
Proceedings of the 11th international ACM SIGACCESS conference on Computers and accessibility
Implicit authentication for mobile devices
HotSec'09 Proceedings of the 4th USENIX conference on Hot topics in security
Timing attacks on PIN input devices
Proceedings of the 17th ACM conference on Computer and communications security
Toward tactile authentication for blind users
Proceedings of the 12th international ACM SIGACCESS conference on Computers and accessibility
The aligned rank transform for nonparametric factorial analyses using only anova procedures
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
On the need for different security methods on mobile phones
Proceedings of the 13th International Conference on Human Computer Interaction with Mobile Devices and Services
Accessibility of CAPTCHA methods
Proceedings of the 4th ACM workshop on Security and artificial intelligence
RhythmLink: securely pairing I/O-constrained devices by tapping
Proceedings of the 24th annual ACM symposium on User interface software and technology
ICDCIT'12 Proceedings of the 8th international conference on Distributed Computing and Internet Technology
Input finger detection for nonvisual touch screen text entry in Perkinput
Proceedings of Graphics Interface 2012
Back-of-device authentication on smartphones
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
ACM Transactions on Accessible Computing (TACCESS)
DigiTaps: eyes-free number entry on touchscreens with minimal audio feedback
Proceedings of the 26th annual ACM symposium on User interface software and technology
Extended PIN Authentication Scheme Allowing Multi-Touch Key Input
Proceedings of International Conference on Advances in Mobile Computing & Multimedia
Under the table: tap authentication for smartphones
BCS-HCI '13 Proceedings of the 27th International BCS Human Computer Interaction Conference
| Hi-index | 0.00 |
Blind mobile device users face security risks such as inaccessible authentication methods, and aural and visual eavesdropping. We interviewed 13 blind smartphone users and found that most participants were unaware of or not concerned about potential security threats. Not a single participant used optional authentication methods such as a password-protected screen lock. We addressed the high risk of unauthorized user access by developing PassChords, a non-visual authentication method for touch surfaces that is robust to aural and visual eavesdropping. A user enters a PassChord by tapping several times on a touch surface with one or more fingers. The set of fingers used in each tap defines the password. We give preliminary evidence that a four-tap PassChord has about the same entropy, a measure of password strength, as a four-digit personal identification number (PIN) used in the iPhone's Passcode Lock. We conducted a study with 16 blind participants that showed that PassChords were nearly three times as fast as iPhone's Passcode Lock with VoiceOver, suggesting that PassChords are a viable accessible authentication method for touch screens.