53 - Cryptography

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SciShow Tangents

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Human beings have always been keeping secrets from each other. They've also always been trying desperately to figure out everyone else's secrets. That's probably why we've had cryptography, the art of hiding messages with codes, for almost as long as we've had written language!   Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions!    If you want to learn more about any of our main topics, check out these links:   [Truth or Fail]   One-time pad https://www.cia.gov/about-cia/cia-museum/experience-the-collection/index.html#!/artifact/21 https://www.doc.ic.ac.uk/~mrh/330tutor/vernam.pdf http://www.cs.columbia.edu/~CS4HS/talks/FrankMillerOneTimePad.pdf https://books.google.com/books?id=tT9WAAAAYAAJ&pg=PA1&source=gbs_selected_pages&cad=2#v=onepage&q&f=false http://netlab.cs.ucla.edu/wiki/files/shannon1949.pdf   Steganographia http://profs.sci.univr.it/~giaco/download/Watermarking-Obfuscation/Trithemius.pdf   [Fact Off]   Chemical messages https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4857388/   Brainwave ID https://www.entrepreneur.com/article/246902 https://www.theverge.com/2013/4/8/4196396/affordable-brainwave-sensors-could-make-typed-passwords-obsolete http://people.ischool.berkeley.edu/~chuang/pubs/usec13.pdf   [Ask the Science Couch]   Timeline http://pi.math.cornell.edu/~morris/135/timeline.html   Khnumhotep II tomb https://books.google.com/books?id=3S8rhOEmDIIC&printsec=frontcover&dq=codebreakers+david+kahn&hl=en&newbks=1&newbks_redir=0&sa=X&ved=2ahUKEwjehLCC5dDlAhWtiOAKHR07DqUQ6AEwAHoECAYQAg#v=onepage&q=khnumhotep&f=false   Scytale https://www.tandfonline.com/doi/abs/10.1080/0161-119891886902 https://www.cs.uri.edu/cryptography/classicaltransposition.htm picture: https://commons.wikimedia.org/wiki/File:Skytale.png   [Butt One More Thing]   Secret butt compartment https://www.nationalgeographic.com/news/2017/12/letters-found-butt-jesus-statue-time-capsule-spain-spd/