An anonymous reader writes: US antivirus vendor Webroot has bought UK-based Prevx in an acquisition that looks like the latest symptom of the growing dissatisfaction among security companies with the current signature-based scanning model for detecting malware.
On the face of it a 20-person software security company based in Derby is an unlikely bride for an ambitious US outfit looking to grow. But since its founding as long ago as 2001, Prevx has been a pioneer of the application fingerprinting technology that in the cloud services era has suddenly become ultra-fashionable.
Application fingerprinting is a very different approach than signature-based detection, and is based on separating the thousands of known good apps from unknown and suspect ones. Any unknown programs encountered are compared to fingerprints in a cloud database to determine whether they are harmful and if they can't be identified at all they are blocked as a precaution.