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SOUPS
2009
ACM
14 years 3 months ago
Balancing usability and security in a video CAPTCHA
We present a technique for using content-based video labeling as a CAPTCHA task. Our CAPTCHAs are generated from YouTube videos, which contain labels (tags) supplied by the person...
Kurt Alfred Kluever, Richard Zanibbi
ASIACRYPT
2003
Springer
14 years 16 days ago
Efficient Group Signatures without Trapdoors
Abstract. Group signature schemes are fundamental cryptographic tools that enable unlinkably anonymous authentication, in the same fashion that digital signatures provide the basis...
Giuseppe Ateniese, Breno de Medeiros
PLDI
2005
ACM
14 years 2 months ago
Checking type safety of foreign function calls
We present a multi-lingual type inference system for checking type safety across a foreign function interface. The goal of our system is to prevent foreign function calls from int...
Michael Furr, Jeffrey S. Foster
CCS
2007
ACM
14 years 3 months ago
Beamauth: two-factor web authentication with a bookmark
We propose BeamAuth, a two-factor web authentication technique where the second factor is a specially crafted bookmark. BeamAuth presents two interesting features: (1) only server...
Ben Adida
EDBT
2010
ACM
138views Database» more  EDBT 2010»
14 years 1 months ago
How to authenticate graphs without leaking
Secure data sharing in multi-party environments requires that both authenticity and confidentiality of the data be assured. Digital signature schemes are commonly employed for au...
Ashish Kundu, Elisa Bertino