Download A Practical Guide to Managing Information Security by Steve Purser PDF

By Steve Purser

This groundbreaking e-book is helping you grasp the administration of data safeguard, targeting the proactive acceptance and backbone of the sensible problems with constructing and enforcing IT defense for the company. Drawing upon the authors' wealth of important event in high-risk advertisement environments, the paintings makes a speciality of the necessity to align the knowledge safeguard procedure as an entire with the necessities of the fashionable firm, which includes empowering company managers to regulate info security-related possibility. all through, the booklet areas emphasis at the use of straightforward, pragmatic threat administration as a device for decision-making. the 1st publication to hide the strategic problems with IT protection, it lets you: comprehend the variation among extra theoretical remedies of data safeguard and operational fact; find out how details defense chance should be measured and accordingly controlled; outline and execute a knowledge protection approach layout and enforce a safety structure; and make sure that restricted assets are used optimally.

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We will take a practical view of risk and avoid a more mathematical approach, as this will allow us to develop a model of risk analysis that can easily be applied to everyday situations. For our purposes, a risk is composed of a threat, a probability, and an impact: Risk = Threat + Probability + Impact Of these three elements, the threat is most often an external factor, which cannot be controlled. For instance, a third party looking to deface Web sites in order to pass a political message is an external threat over which we cannot reasonably expect to exert any control.

In this new environment, the very people we wish to do business with may be situated at vast distances, making any kind of face-to-face contact impossible. As a result, what started as a simple problem of authentication has now become a complex problem of trust. How can we be sure that the people using our systems are the people we think they are, and indeed how clear is our image of who we think they are? At present, we have only partial answers to these questions. By deploying specially designed authentication protocols, based on a cryptographic approach, we can effectively solve the problem of authentication.

Documentation that is never read or is not correctly updated does not add much value to anyone. Auditors in particular should take note here—one of the consequences of performing audits on a system-by-system basis is that it is difficult to keep track of scalability issues.

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