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Tag Archives: negative testing

Glitch Reporting Glitch. Where was V&V?

– You are likely well aware of the computer failure that cost Knight Capital Group, Inc. $440 million in just 45 minutes at the opening of the New York Stock Exchange on Wednesday, August 1, 2012. A programming mistake apparently caused KCG’s trading system to send out large numbers of erroneous…

Vindication for Toyota? Proving the Negative

– In my February 16, 2010 Bloginfosec column “Negative Testing Revisited – Vehicle Control Systems (Part 1),” I describe and discuss the concerns about the software controlling the brakes on Toyota regular-engine and hybrid vehicles and Ford hybrids. The supposition was that there were…

Bungee Jumps, Stock Markets and Negative Testing

– On Thursday, May 6, 2010, the Dow Jones index experienced a 1000-plus-point fall, followed by a rapid recovery of some 700 points. This event shocked traders, regulators, and the public alike. It came as a big surprise to many how a drop in stock prices (possibly a result of a data-input error, or…

Negative Testing Revisited – Vehicle Control Systems (Part 1)

– In my January 11, 2010 column “Security Testing’s Missing Link and the Revelation of Drone Images,” I recounted the episode of the interception by terrorists of the transmission of video images from drones. I attributed much of the issue to a lack of negative testing, that is, testing for…