What Is SHAttered? SHA-1 Collision Attacks, Explained

On the first day of 2016, Mozilla terminated support for a weakening security technology called SHA-1 in the Firefox web browser. Almost immediately, they reversed their decision, as it would cut access to some older websites. But in February 2017, their fears finally came true: researchers broke SHA-1 by creating the first real-world collision attack. Here’s what all that means.

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by Eric Z Goodnight via How-To Geek