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Linux Firewalls by Michael Rash

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Security Through Obscurity?

Do port knocking or SPA fall into the category of security through obscurity? This has been a hotly debated topic since port knocking was first announced to the security community, and people have strong feelings on both sides. No doubt the controversy will not be settled here; my hope is to provide some food for thought.[77]

When a new security technology is proposed, researchers around the globe vet its architecture. One of the common tests of a security technology is whether or not it suffers from security through obscurity; if it does, people try to fix the architecture. It is therefore important to determine whether SPA suffers from security through obscurity. Bruce Schneier states the following in the preface to ...

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