2FA: Two Factor Authentication – Computerphile

Just what’s going on when your email provider wants to send you a text message? Dr Mike Pound talks about multi-factor authentication.

Password Cracking:
The End of Time (Unix Time) – Numberphile:

This video was filmed and edited by Sean Riley.

Computer Science at the University of Nottingham:

Computerphile is a sister project to Brady Haran’s Numberphile. More at

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