The Birthday Paradox

How many people need to be in a room before there’s a 50% chance that two of them share the same birthday? Is it about 180, since that’s around half of 365? Is it only 100? The real answer is surprisingly much, much smaller. If you have just 23 people in a room, the odds of whether two get presents on the same day is a coin flip. Get 50 people together and that shared-birthday probability skyrockets to 97%. A handful more and it’s a virtual statistical certainty. Really? Yes, really! With the aid of tiny plastic babies and some mathematics, Kevin proves and visualizes this surprising veridical paradox. **** LINKS **** Birthday Attack Example In Hacking https://www.youtube.com/watch?v=4shxYyV4O_k Birthday Attack Hash Collision https://www.youtube.com/watch?v=18ihbf1EqRw Hashing Algorithms And Security - Computerphile https://www.youtube.com/watch?v=b4b8ktEV4Bg Discussion On The Birthday Attack https://www.youtube.com/watch?v=2bEL3ok8D70 The Birthday Attack https://danielmiessler.com/study/birthday_attack/ *********** Vsauce2 Links Twitter: https://twitter.com/VsauceTwo Facebook: https://www.facebook.com/VsauceTwo Hosted, Produced, And Edited by Kevin Lieber Instagram: http://instagram.com/kevlieber Twitter: https://twitter.com/kevinlieber Website: http://kevinlieber.com Research And Writing by Matthew Tabor https://twitter.com/matthewktabor Huge Thanks To Paula Lieber https://www.etsy.com/shop/Craftality Get Vsauce's favorite science and math toys delivered to your door! https://www.curiositybox.com/ Select Music By Jake Chudnow: http://www.youtube.com/user/JakeChudnow MY PODCAST -- THE CREATE UNKNOWN https://www.youtube.com/thecreateunknown