317 search results - page 46 / 64 » Practical Key Distribution Schemes for Channel Protection |
111
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INFOCOM
2011
IEEE
14 years 1 months ago
2011
IEEE
—Cognitive radios (CRs) can mitigate the impending spectrum scarcity problem by utilizing their capability of accessing licensed spectrum bands opportunistically. While most exis...
GLOBECOM
2007
IEEE
15 years 4 months ago
2007
IEEE
— Spectrum sensing is a key enabling functionality in cognitive radio (CR) networks, where the CRs act as secondary users that opportunistically access free frequency bands. Due ...
ICIP
2006
IEEE
15 years 11 months ago
2006
IEEE
In steganography (the hiding of data into innocuous covers for secret communication) it is difficult to estimate how much data can be hidden while still remaining undetectable. To...
CDC
2008
IEEE
15 years 4 months ago
2008
IEEE
—We study the problem of dynamic spectrum sensing and access in cognitive radio systems as a partially observed Markov decision process (POMDP). A group of cognitive users cooper...
106
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CODASPY
2012
13 years 5 months ago
2012
Recent years have witnessed the trend of leveraging cloudbased services for large scale content storage, processing, and distribution. Security and privacy are among top concerns ...