With the rapid development of wireless communication technology,there is a urge requirement for the con-vergence of wireless and Internet. But the high BER, fading and occasionally occurred handoff in wireless network...
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With the rapid development of wireless communication technology,there is a urge requirement for the con-vergence of wireless and Internet. But the high BER, fading and occasionally occurred handoff in wireless networksheavily deteriorate the performance of traditional communication protocols such as TCP/UDP. This paper provides anoverview of the techniques which can improve data transmission over wireless links ,defines a taxonomy based on dif-ferent protocol layers ,and finally discusses the trends in this field.
Main focus of database security research is maintaining data security and providing timely data services. Toensure security, inference attack and aggregate attack are the problems, which should be solved. But these wi...
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Main focus of database security research is maintaining data security and providing timely data services. Toensure security, inference attack and aggregate attack are the problems, which should be solved. But these will leavevolumes of data to discover some useful knowledge, and some data mining methods used in this field will bring forthsome positive or even negative results. In this paper, we survey what data mining has done on database security andpresent some open problems and possible future research directions.
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