233 search results - page 47 / 47 » CAPTCHA: Using Hard AI Problems for Security |
SENSYS
2006
ACM
14 years 5 days ago
2006
ACM
Introducing mobile data sinks into wireless sensor networks (WSNs) improves the energy efficiency and the network lifetime, and is demanded for many application scenarios, such a...
IMC
2004
ACM
13 years 11 months ago
2004
ACM
Current intrusion detection and prevention systems seek to detect a wide class of network intrusions (e.g., DoS attacks, worms, port scans) at network vantage points. Unfortunatel...
IJISEC
2007
13 years 6 months ago
2007
The vision of ubiquitous computing is becoming a reality thanks to the advent of portable devices and the advances in wireless networking technologies. It aims to facilitate user ...