SHA 256 is an algorithm that takes a digital input of any length and returns a string of 256 bits (typically converted to 64 hexadecimal digits). It's a one-way algorithm, which means there's no known way to practically retrieve the input from the output. As far as anyone knows, there has never been an instance of two different inputs having the same output, which means the hash of an input is a reliable unique digital fingerprint.
In this 6-minute video, Matthew Weathers explains why SHA 256 is "useful for digital signatures, cryptography, authentication, and is a central part of the Bitcoin protocol."
YouTuber CGP Grey is known for breaking down complex subjects so that they can be understood by just about anyone. His most recent animated video is no exception. In it, he answers the question, “How do all the algorithms around us learn to do their jobs?,” ie. how do machines learn? Good stuff. He’s even […]
Last month, James "New Aesthetic" Bridle published an influential essay exploring the prolific and disturbing video-spam that had come to dominate Youtube Kids, in which seemingly algorithmically generated videos endlessly recombined a handful of Disney characters and assorted others engaged in violent, abusive and even psychosexual conduct, over a soundtrack of a few repeated public-domain […]
The Paradise Papers continue to expose the economically useless activity that late-stage capitalism rewards with titanic sums of money: today, it's the story of Julien Lavallée, a botmaster ticket-scalper who has harvested the lion's share of concert tickets from all over the world, laundering them for millions through a secret "top seller" program that Stubhub […]
There’s no shortage of stories about the benefits of cannabidiol, that benign (and non-psychoactive) cousin of THC. Some have been using it for years to deal with pain, stress, and sleeplessness. And the more people use it, the more discussion there is about how to use it. While there’s no shortage of quality edibles on […]
Are we done with capsule coffee makers yet? Sure, they’re easy. But they are not so easy on the environment, and it’s debatable whether they actually make a better cup. Luckily, there’s never been a better time to switch back to the good old reliable drip method – especially when drip coffeemakers have quietly been […]
If there’s one thing that stayed consistent through the last decade or so of tech industry turmoil, it’s the love affair between techies and Linux. There’s just a ton you can do with the OS, and its open-source format means you can customize your rig from the ground up. Apparently not content with that level […]