What Is SHA-1, and Why Will Retiring It Kick Thousands Off the Internet?
On the first day of 2016, Mozilla terminated support for a technology called SHA-1 in the Firefox web browser. Almost immediately, they reversed their decision, because it would have cut off important internet access to thousands–if not millions–of people. But what does this technology do? Why would it cut off access? And why would they ever decide to remove it in the first place?
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