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WiFi based phones are becoming increasingly popular due to the ubiquitous presence of wireless LANs and the use of unlicensed spectrum. These phones use VoIP techniques over wireless LANs. In addition to the spectral efficiency and security issues, energy consumption is a vital issue in making the usage of these phones widespread. Efforts are underway in improving energy conservation in these phones...
In many applications of sensor networks, security is a very important issue. To be resistant against the various attacks, nodes in a sensor network can establish pairwise secret keys, authenticate all communications with cryptographic functions, and also apply secure information aggregation schemes or hop-by-hop filtering methods. However, these security measures can take considerable overhead in...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.