Re: CAPTCHAs-Understanding CAPTCHA-Solving Services in an Economic Context.
Marti MotoyamaKirill LevchenkoChris KanichDamon McCoyGeoffrey M. VoelkerStefan SavagePublished in: USENIX Security Symposium (2010)
Keyphrases
- context aware
- context aware systems
- ubiquitous computing
- contextual information
- pervasive computing
- context awareness
- web services
- information services
- service discovery
- service oriented
- mobile applications
- data sets
- information resources
- agent technology
- context sensitive
- user centric
- mobile services
- electronic commerce
- service delivery
- neural network