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 […]
Everybody could use a little improvement, especially those of us on the hunt for new careers. Each job requires a different set of skills, and that list can change from year to year or even month to month as new technologies emerge. When you’re in that race and need to learn fast, the old model […]
In recent years, natural language processing technology and language translation technology have advanced greatly. The trouble is, language translation software typically comes in the form of apps. And while your mileage may vary on their usefulness, they share one thing in common: a serious drain on the battery for your smartphone, the very thing you’ll […]
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