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Christian Gruber — Wed, 14 May 2008 18:39:03 +0000

This was actually cribbed from a Bruce Schneier blog post about security...

Buy amikacin without prescription, Security engineers see the world differently than other engineers. Buy amikacin low price, Instead of focusing on how systems work, they focus on how systems fail, order amikacin in canada, Cheapest amikacin prices, how they can be made to fail, and how to prevent--or protect against--those failures, amikacin prescription. Buy discount amikacin, Most software vulnerabilities don't ever appear in normal operations, only when an attacker deliberately exploits them, buy amikacin us. Buy amikacin, So security engineers need to think like attackers.People without the mindset sometimes think they can design security products, but they can't, cost amikacin. Buy amikacin low price, And you see the results all over society--in snake-oil cryptography, software, amikacin order, Cheapest generic amikacin online, Internet protocols, voting machines, buy amikacin, Amikacin online stores, and fare card and other payment systems. Many of these systems had someone in charge of "security" on their teams, but it wasn't someone who thought like an attacker.Â Â

There's an interesting parallel between this statement and how most software quality is handled, buy amikacin without prescription. Quality and Security are similar, buy amikacin online. Buy discount amikacin, In fact, I see security as a very specific subset of quality-mindedness, amikacin in bangkok. Buy amikacin once daily, Certainly both require the same mindset to ensure - rather than thinking merely "how will this work", a quality-focused person will also, amikacin cheap drug, Buying generic amikacin, or perhaps alternately think: "how might this be breakable". From this simple change in thinking flows several important approaches

Constraint-based thinking (as opposed to solution based thinking): allows an architect/developer to conceive of the set of possible solutions, buy amikacin without prescription, Buy amikacin on line, rather than an enumeration of solutions. Buy amikacin without prescription, By looking at constraints, a developer implements the lean principle of deciding as late as possible, with as full information as possible.
Test-First: As one thinks of how it might break, scenarios emerge that can form the basis of test cases. These cases form a sort of executable acceptance criteria
Lateral Thinking: The constraint+test approach starts to get people into a very different mode, buy amikacin no rx, Amikacin medication, where vastly different kinds of solutions show up. The creative exercise of trying to break something provides insights that can change the whole approach of the system.

Â Schneier goes on to ponderÂ

This mindset is difficult to teach, order amikacin overnight delivery, Low price amikacin, and may be something you're born with or not. But in order to train people possessing the mindset, amikacin rx, Amikacin information, they need to search for and find security vulnerabilities--again and again and again. And this is true regardless of the domain, real amikacin without prescription. Good cryptographers discover vulnerabilities in others' algorithms and protocols, buy amikacin without prescription. Certified amikacin, Good software security experts find vulnerabilities in others' code. Good airport security designers figure out new ways to subvert airport security, amikacin cheap price. Amikacin no rx, And so on.Â Â

Â Here again - I think it's possible to help people get a mind-set about quality, but some do seem to have a knack, compare amikacin prices. Find cheap amikacin online, It's important to have some of these people on your teams, as they'll disturb the waters and identify potential failure modes, cheapest generic amikacin. Buy amikacin without prescription, These are going to be the ones who want to "mistake proof" (to borrow Toyota's phrase) the system by writing more unit tests and other executable proofs of the system. Purchase amikacin, But most importantly (and I can personally testify to this) it is critical that people just write more tests. It is a learned skill to start to think of "how might this fail" until it becomes a background mental thread, find amikacin no prescription required, Buy amikacin cheap, always popping up risk models.A related concept is Demmings' "systems-thinking", which, buy no rx amikacin, Amikacin in malaysia, applied to software quality, causes one to start looking at whole ecosystems of error states, buy amikacin us. This is when fearless re-factoring starts to pay off, because the elimination of duplication allows one to catch classes of error in fewer and fewer locations, where they're easier to fix. There are many and multifarious spin-off effects of this inverted questioning and the mindset it generates. Try it yourself, buy amikacin without prescription. When you're writing code, ask yourself how you might break it. What inputs, external state, etc. might cause it to fail, crash, or behave in odd ways. This starts to show you where you might have state leaking into the wild, or side-effects from excessively complex interactions in your code. So quality focus can start to improve not only the external perception of your product, but also its fitness to new requirements by making it more resilient and less brittle. Cleaner interactions and less duplication allow for much faster implementation of new features.I could go on, but I just wanted to convey this sense of "attitude" or "mindset," over mere technique. Technique can help you get to a certain level, but you have to let it "click", and the powerful questions can sometimes help.

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Christian Gruber — Mon, 31 Mar 2008 20:08:36 +0000

Buy avelox without prescription, One of my favorite books in the world is Systemantics, by John Gall. This irreverent look at systems and how they fail has a lot to teach a community that is attempting to re-work the systems of software development, avelox non prescription. Buy discount avelox online, Much of it justifies the "simple set of principles, applied" approach that most Agile methods use, order no rx avelox. Buy avelox lowest price, It should also provide good insights into anyone trying to develop and architect complex software systems. The best kind of parody is one that's hard to tell if it's parody, buy discount avelox online, Avelox tablets, because it's so insightful.

The book is available from the author at the Systems Bible page.

A decent quick look at the kind of material found inside can be found here: Commentary on the principles of "Systemantics", by Anthony Judge

And this article goes into more discussion about Gall's laws of systemantics: Bart Stewart on Systemantics

UPDATED: Best quote yet: "Admittedly, price of avelox, Cheapest avelox price, it's not easy to imagine what a self-organizing car engine would look like, but maybe it's time someone tried." -Bart Stewart

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