Communications of the ACM
PassPoints: design and longitudinal evaluation of a graphical password system
International Journal of Human-Computer Studies - Special isssue: HCI research in privacy and security is critical now
International Journal of Human-Computer Studies - Special isssue: HCI research in privacy and security is critical now
Déjà Vu: a user study using images for authentication
SSYM'00 Proceedings of the 9th conference on USENIX Security Symposium - Volume 9
On user choice in graphical password schemes
SSYM'04 Proceedings of the 13th conference on USENIX Security Symposium - Volume 13
The design and analysis of graphical passwords
SSYM'99 Proceedings of the 8th conference on USENIX Security Symposium - Volume 8
Modeling user choice in the PassPoints graphical password scheme
Proceedings of the 3rd symposium on Usable privacy and security
On predictive models and user-drawn graphical passwords
ACM Transactions on Information and System Security (TISSEC)
Evaluation of eye-gaze interaction methods for security enhanced PIN-entry
OZCHI '07 Proceedings of the 19th Australasian conference on Computer-Human Interaction: Entertaining User Interfaces
Eyepass - eye-stroke authentication for public terminals
CHI '08 Extended Abstracts on Human Factors in Computing Systems
Look into my eyes!: can you guess my password?
Proceedings of the 5th Symposium on Usable Privacy and Security
Exploring the Use of Discrete Gestures for Authentication
INTERACT '09 Proceedings of the 12th IFIP TC 13 International Conference on Human-Computer Interaction: Part II
Touch me once and i know it's you!: implicit authentication based on touch screen patterns
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
BroAuth: evaluating different levels of visual feedback for 3D gesture-based authentication
Proceedings of the International Working Conference on Advanced Visual Interfaces
Designing textual password systems for children
Proceedings of the 11th International Conference on Interaction Design and Children
Graphical passwords: Learning from the first twelve years
ACM Computing Surveys (CSUR)
Back-of-device authentication on smartphones
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Proceedings of the 15th international conference on Human-computer interaction with mobile devices and services
Quantifying the security of graphical passwords: the case of android unlock patterns
Proceedings of the 2013 ACM SIGSAC conference on Computer & communications security
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Authentication today mostly relies on passwords or personal identification numbers (PINs). Therefore the average user has to remember an increasing amount of PINs and passwords. Unfortunately, humans have limited capabilities for remembering abstract alphanumeric sequences. Thus, many people either forget them or use very simple ones, which implies several security risks. In this work, a novel authentication method called PassShapes is presented. In this system users authenticate themselves to a computing system by drawing simple geometric shapes constructed of an arbitrary combination of eight different strokes. We argue that using such shapes will allow more complex and thus more secure authentication tokens with a lower cognitive load and higher memorability. To prove these assumptions, two user studies have been conducted. The memorability evaluation showed that the PassShapes concept is able to increase the memorability when users can practice the PassShapes several times. This effect is even increasing over time. Additionally, a prototype was implemented to conduct a usability study. The results of both studies indicate that the PassShapes approach is able to provide a usable and memorable authentication method.