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SOUPS
2005
ACM
15 years 10 months ago
Authentication using graphical passwords: effects of tolerance and image choice
Graphical passwords are an alternative to alphanumeric passwords in which users click on images to authenticate themselves rather than type alphanumeric strings. We have developed...
Susan Wiedenbeck, Jim Waters, Jean-Camille Birget,...
CCS
2008
ACM
15 years 6 months ago
Tupni: automatic reverse engineering of input formats
Recent work has established the importance of automatic reverse engineering of protocol or file format specifications. However, the formats reverse engineered by previous tools ha...
Weidong Cui, Marcus Peinado, Karl Chen, Helen J. W...
SODA
2003
ACM
114views Algorithms» more  SODA 2003»
15 years 5 months ago
Lower bounds for collusion-secure fingerprinting
Collusion-secure fingerprinting codes are an important primitive used by many digital watermarking schemes [1, 10, 9]. Boneh and Shaw [3] define a model for these types of codes...
Chris Peikert, Abhi Shelat, Adam Smith
SACMAT
2006
ACM
15 years 10 months ago
Fine-grained role-based delegation in presence of the hybrid role hierarchy
Delegation of authority is an important process that needs to be captured by any access control model. In role-based access control models, delegation of authority involves delega...
James B. D. Joshi, Elisa Bertino
SOUPS
2005
ACM
15 years 10 months ago
Stopping spyware at the gate: a user study of privacy, notice and spyware
Spyware is a significant problem for most computer users. The term “spyware” loosely describes a new class of computer software. This type of software may track user activitie...
Nathaniel Good, Rachna Dhamija, Jens Grossklags, D...