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For problems like these, most institutions with large computer installations adopt and enforce policies that catalog the requirements and responsibilities of the users Operating Systems: Security Attacks from inside Once an intruder (or perhaps an authorized user with malicious intent) gains access to a computer system, the next step is usually to explore, looking for information of interest or for places to insert destructive software. This is a straight- forward process if the prowler has gained access to the administrator’s account.
BT404 HANDOUTS PDF
which is why the administrator’s password is closely guarded. If, however, access is through a general user’s account, it becomes necessary to trick the operating system into allowing the intruder to reach beyond the privileges granted to that user. For example, the intruder may try to trick the memory manager into allowing a process to access main memory cells outside its allotted area, or the prowler may try to trick the file manager into retrieving files whose access should be denied.
BT404 HANDOUTS-FOOD BIOTECHNOLOGY:
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BT404 HANDOUTS PDF-FOOD BIOTECHNOLOGY:
With all the technical complexities associated with computer security, it is surprising to many that one of the major obstacles to the security of computer systems is the carelessness of the users themselves. BT404 Handouts PDF Current CPUs are equipped with features designed to prevent such attempts. For example, think of: You must limit the process to the memory area allocated by the memory manager.
This restriction causes the process to clear the operating system from the main memory. BT404 Handouts PDF To meet these challenges, CPUs designed for multiprogramming systems typically include A special registry that allows the operating system to store the upper and lower bounds of a process.
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