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Intrusion detection systems alert the system administrators of intrusions but, in most cases

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This chapter introduces computer and network forensics. The world of forensics is well understood in the non-digital world, whereas this is a nascent field in the digital cyberworld. Digital evidence is being increasingly used in the legal system such as e-mails, disk drives containing damaging evidence, and so on. Computer forensics deals with preserving and collecting digital evidence on a single machine while network forensics deals with the same operations in a connected digital world. Several related issues and available tools are discussed in this chapter.

We propose an adaptive channel allocation algorithm applicable in multicarrier cellular CDMA systems. In 0111' method, traffic channels are assigned to a mobile user based on cell traflic load and nsei. mobility pattern. Depending on the mobility pattern (and the pi-obabiliQ of moving to a neighbor-ing cell), the algorithm selects the best-suited carrier for the mobile), which maj, not always be the least loaded carrier in the cell. Performance measurements include peiwntage of calls blocked, percentage of calls dropped, percentage of supported call duration (in relation to its total required duration), and sirpporied during soft handom. Simulation results show that the algorithm offers signijkant system performance improvements over hashing based algorithms and is suitable for next generation cellular system.