The art of unexpected

Expecting the unexpected?I am reading through the report of a Google vulnerability on The Reg and laughing. This is a wonderful demonstration of what the attackers do to your systems – they apply the unexpected. The story is always the same. When we build a system, we try to foresee the ways in which it will be used. Then the attackers come and use it in a still unexpected way. So the whole security field can be seen as an attempt to expand the expected and narrow down the unexpected. Strangely, the unexpected is always getting bigger though. And, conversely, the art of being an attacker is an art of unexpected, shrugging off the conventions and expectations and moving into the unknown.

Our task then is to do the impossible, to protect the systems from unexpected and, largely, unexpectable. We do it in a variety of ways but we have to remember that we are on the losing side of the battle, always. There is simply no way to turn all unexpected into expected. So this is the zen of security: protect the unprotectable, expect the unexpectable and keep doing it in spite of the odds.

On the utility of technical security

It is often said that the system is only as strong as the weakest link. When you have good security and strong passwords, the weakest link will be the human. As has always been. Think of how the system can be recovered from a breach when the problem is not technical but human.

[youtube=http://youtu.be/W50L4UPfWsg]

Why bother?

Hmm… Good question… Well, let’s get this straightened out before we jump into other interesting subjects. Every single website and application, every single computer system gets broken into. For fun, money, fame, accidentally. This is just the way it is and I have to accept this as the current reality. I may not like it but who cares about that?

Whether you are a large corporation or a student writing the first website, your system will get broken into. If your system has been around for a while, it was already broken into. My not-so-extremely-popular website was broken into already three times (that I know of) and I am not ashamed to admit it. Denial is futile. Take it as inevitable.

There is even a line of thought nowadays with some of the security people that we should not bother to concentrate so much on trying to protect things for we can’t prevent break-ins anyway. They say we should concentrate on detecting and containing the damage from break-ins. Ah, bollocks. We have to do both. Do not give up your defenses just because you know they will be eventually breached. But be prepared.

What I really want to say is that when you make a computer system, be it a website, corporate network, smart card or anything else, you have no choice. Thinking that security is somebody else’s problem is extremely common, second only to not thinking about security at all, and usually disastrous in a not-so-distant future. Don’t be like that. Come to the good side, protect your system, think of security long and hard, apply the Hash and the Crypto the Right Way™ and your system will run happily ever after (well, at least to the next major breakthrough in cryptography or something).

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