Anthony Y. F. Tsang

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Distributed denial-of-service (DDoS) attack has turned into one of the major security threats in recent years. Usually the only solution is to stop the services or shut down the victim and then discard the attack traffic only after the DDoS attack characteristics (such as the destination ports of the attack packets) are known. In this paper, we introduce a(More)
It has been shown that the rat epididymis secretes proteins and organic compounds which may play a role in sperm maturation and storage. A method has been described to study caudal epididymal secretion in anaesthetized rats in vivo. The cauda epididymidis was luminally perfused with Krebs bicarbonate solution. The perfusate collected at the vas deferens was(More)
The forward motility of the rat caudal epididymal spermatozoa has been studied in different Na+ concentrations. When spermatozoa were suspended in a completely Na+-free solution, the forward motility suffered a progressive fall and after 3 h was completely suppressed. This effect was fully reversible on resuspending the spermatozoa in a solution containing(More)
In this paper, we present the design, the implementation details, and the evaluation results of an intrusion detection and defense system for distributed denial-of-service (DDoS) attack. The evaluation is conducted using an experimental testbed. The system, known as intrusion detection router (IDR), is deployed on network routers to perform online detection(More)
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