17 search results - page 4 / 4 » Quality-of-Context and its use for Protecting Privacy in Con... |
CCS
2010
ACM
13 years 5 months ago
2010
ACM
We systematically study the design of image recognition CAPTCHAs (IRCs) in this paper. We first review and examine all IRCs schemes known to us and evaluate each scheme against th...
NETWORK
2008
13 years 4 months ago
2008
One of the most compelling social questions, which until now was left unanswered by current technology, is "Who's that?" This question is usually asked about a new ...