Ben Eater | How do CRCs work? @BenEater | Uploaded 5 years ago | Updated 2 hours ago
CRC (cyclic redundancy check) is one of the most common methods of error detection. It uses some interesting mathematical tricks to guarantee that it can catch certain kinds of errors. How does it work?

Support these videos on Patreon: https://www.patreon.com/beneater or https://eater.net/support for other ways to support.

00:00 - Detecting errors with modulo division
10:51 - Message data as a polynomial
16:41 - Finite fields
22:57 - Polynomial division
31:04 - Sending and verifying CRC
36:29 - Choosing a generator polynomial

------------------

Social media:
Website: https://www.eater.net
Twitter: https://twitter.com/ben_eater
Patreon: https://patreon.com/beneater
Reddit: https://www.reddit.com/r/beneater

Special thanks to these supporters for making this video possible:
Ben Dyson
Ben Kamens
Ben Williams
Brandon Stranzl
Christopher Blackmon
Debilu Krastas
Eric Dynowski
Gonzalo Belascuen
Greg Stratton
Jay Binks
Jayne Gabriele
Johnathan Roatch
Jordan Scales
Manne Moquist
Michael
Nicholas Moresco
Nick Wrightsman
Randy True
Ric Allinson
Sachin Chitale
SonOfSofaman