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I think we should be able to agree to this point. This is a function based on a survival model - see the following for Security is thus a function of probability and may be Risk may be represented using a probabilistic model - and as a result so If there is no threat to exploit the vulnerability - there is no risk. If no vulnerability exists than there is nothing to exploit and no risk. If there is no impact there is no cost or risk.

Risk is the probability that vulnerability will be exploited by a threat Terminology such that we all know what I am issuing/spewing forth etc. As such as anĪddendum to the prior posts I have included this to aide in the I have to stop assuming that everyone is an academic junkie like myselfĪnd knows the correct taxonomy of all the terms I spout. Cacahuate via Flickr.By Thread RE: RE: Re: Concepts: Security and Obscurity

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Perhaps the best conclusion is that, as one user commented on Information Security Stack Exchange, 'Security ONLY through obscurity is terrible.' Referring to the previous example, changing to a non-standard port in addition to using strong SSH password and key protection is probably an excellent idea. While further digging can locate the administrator's numerical security identifier, at the very least the intruder has been slowed down. This simple measure will slow down any hacker trying to log in as an administrator. For example, many security professionals advocate hiding the administrator account. However, as TechNet Magazine points out, obscurity can be a useful tool when added to existing layers of high-quality encryption.

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The Open Web Application Security Project gives a good example of Kerckhoff's principle at work: Linux source code is available through countless open doors, and yet when secured with proper keys it makes a robustly impenetrable operating system. Kerckhoff's principle, which directly contradicts 'security through obscurity,' still remains a best practice in today's information age.

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This principle centers on the expectation that enemies will acquire access to the full architecture of a system, and so safety lies in an explicit cryptographic key rather than in the hope of keeping the system's structure secret. He stated that a system's security should lie wholly in its key, and that as long as the key remains unknown the system should remain secure. Interestingly enough, the principles of 21st century computer security are based on a nineteenth century axiom created by cryptographer Auguste Kerckhoff.

IT Security Should Follows this Historic Principle While this would stop some attacks, a knowledgeable intruder would simply run a port scanner until he or she finds a server using a non-standard port and would then have access to the server. TechNet Magazine gives an example in which a vulnerable web server that could be attacked through Port 80 simply switches to Port 81. If the safety of an application relies on its source code remaining unknown, that provides little protection. What can work well in a brief window of the physical world, however, is less safe in the never-sleeping online universe. Some computer security experts say this concept can be applied to protecting vital data, but, due to fundamental vulnerability, it should never be the sole Publish approach for computer security. This particular transaction was successful because it didn't raise the suspicion of thieves. It was put to test in the real world in 2008, when the American Numismatic Society transported a collection of rare coins worth hundreds of millions of dollars by using ordinary moving trucks and movers unaware of the precious cargo. For the uninitiated, the term is a security strategy that emphasizes secrecy over protections. * Despite the term security by obscurity's pejorative origin, it has a place in computer security. In the never-sleeping online universe these same methods won't carry over too perfectly. * In the physical world, secrecy is an asset to security.

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How to Properly Implement Security by Obscurity.

Security obscurity