Access Controls Authentication deals with the   who   of security policy enforcement; access controls enforce the   what   and how . ACLs on Routers Routers perform the major task of directing network traffic either to subnetworks they control or to o…

Network Security

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Strong Authentication As we have seen in earlier chapters, operating systems and database management systems enforce a security policy that specifies who—which individuals, groups, subjects—can access which resources and objects. Central to that policy is…

Network Security

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Content Integrity Content integrity comes as a bonus with cryptography. No one can change encrypted data in a meaningful way without breaking the encryption. This does not say, however, that encrypted data cannot be modified. Changing even one bit of an e…

Network Security

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Encryption Encryption is probably the most important and versatile tool for a network security expert. We have seen in earlier chapters that encryption is powerful for providing privacy, authenticity, integrity, and limited access to data. Because network…

Network Security

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Architecture As with so many of the areas we have studied, planning can be the strongest control. In particular, when we build or modify computer-based systems, we can give some thought to their overall architecture and plan to "build in" securi…

Network Security

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Security Threat Analysis Recall the three steps of a security threat analysis in other situations. First, we scrutinize all the parts of a system so that we know what each part does and how it interacts with other parts. Next, we consider possible damage …

Network Security

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Network Security Controls The list of security attacks is very long, and the news media carry frequent accounts of serious security incidents. From these, you may be ready to conclude that network security is hopeless. Fortunately, that is not the case. P…

Network Security

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Write a PROLOG program for Family Relationship.   MOTILAL (SWARUPMATI)                JAVAHARLAL                      VIJYALAKSHMI                                     KRISHNA            (KAMLA)                                  (RANJIT) …

artificial intelligence

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