Pieter Arntz
Malware Intelligence Researcher

Was a Microsoft MVP in consumer security for 12 years running. Can speak four languages. Smells of rich mahogany and leather-bound books.

February 17, 2017 - Bayesian spam filtering is based on Bayes rule, a statistical theorem that gives you the probability of an event. In Bayesian filtering it is used to give you the probability that a certain email is spam. The name Named after the statistician Rev. Thomas Bayes who provided an equation that basically allows new information to...

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February 8, 2017 - Spigot browser hijackers of this family are easy to recognize and in our opinion hardly worth installing because they add no more functionality then a few bookmarks. We hope this post helps you to avoid them in the future.

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January 20, 2017 - With data breaches resulting in leaked passwords occurring almost daily, two-factor authentication has become an essential tool in the security toolkit.

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January 10, 2017 - This post is intended to make readers aware of the existence and use of environmental variables. A windows feature that is often only known to programmers and other advanced users.

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December 14, 2016 - As a demonstration of how Tech Support Scammers operate and try to lure victims into calling their number, we show you some snippets of the code, explaining what they're up to.

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