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The technology of instant messaging (IM) is becoming an important means of communication nowadays. However, some inherit security weaknesses have been recognized as a serious barrier for IM building up its position as an Internet key application. This paper presents a security design for IM on the basis of comparison between the RSA algorithm and the 3DES algorithm that satisfy the requirements at...
Data mining techniques have been developed in many applications. However, they also cause a threat to privacy. In this paper, we proposed a greedy method for hiding the number of sensitive rules. The experimental results showed that the undesired side effects can be avoided in the rule hiding process by use of our approach. The results also revealed that in most cases, all the sensitive rules are...
MIMO systems may achieve spatial multi-user access using singular value decomposition (SVD) MIMO techniques [J.Z. Ying and K.B. Letaief, 12005; J. Kim and J.M. Cioffi, 2000]. The MIMO OFDM systems multiplex the users both in the frequency and the spatial domains. Hence, the co-channel interference caused by the sub-carrier reuse may lower the system's performance. For MIMO OFDM systems with co-channel...
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