SHA: Secure Hashing Algorithm - Computerphile

1,215,002

22,061 547

Published 2017-04-11

Secure Hashing Algorithm (SHA1) explained. Dr Mike Pound explains how files are used to generate seemingly random hash strings.

EXTRA BITS: • EXTRA BITS - SHA1 Problems - Computer...
Tom Scott on Hash Algorithms: • Hashing Algorithms and Security - Com...

www.facebook.com/computerphile
twitter.com/computer_phile

This video was filmed and edited by Sean Riley.

Computer Science at the University of Nottingham: bit.ly/nottscomputer

Computerphile is a sister project to Brady Haran's Numberphile. More at www.bradyharan.com/

All Comments (21)

@realeques 7 years ago

Mike Pound is by far my favorite person on this channel... he has the most interesting subjects, shines with crazy knowledge while still keeping the video fresh and dynamic.
@DanMcB1 3 years ago

This is too much work, can’t we just trust each other?
@Timber5887 6 years ago

I could sit and watch videos from this guy all day long, so informative and laid back
@Sicaoisdead 4 years ago

Love how these videos get STRAIGHT to the point.
@krishnanmuru-girthy7656 3 years ago

Been watching a whole bunch of Mike's videos as a complement to my introductory module on Security and Authentication. One of the best teachers I have come across!
@jony7779 7 years ago

Mike Pound is the best! I love hearing him explain things – keep em coming!
@canyakar7443 1 year ago

I've been trying to understand the concept for 3 days from the slides my teacher covered and the book she shared and ended up with complicated mind, this video gave me a pure understanding in 10 mins. Great job!
@CJBurkey 7 years ago

This is my favorite guy on this channel. I just love stuff like this.
@JimmyGeniusEllis 5 years ago

I am at a hackathon in Chicago Illinois at Illinois Institute of technology and I have to use sha-1 on some facts before I pass then to an api so I can make a project for the Hackathon. You did a wonderful job telling me what she-1 was so I could understand the cryptic api documentation. Thank you very much.
@andysmith1870 6 years ago

Thanks, Dr Pound (if you read this). I find your demeanour easy to engage with, and you set me off on the journey of understanding fully (with much work!).
@xXParzivalXx 7 years ago

Hmm, so far this is fairly straightforward, but the interesting part would be how exactly these compression functions work. Will there be a follow-up video on that?
@seraph3290 7 years ago

Mike you are my favourite person to appear on this channel. I enjoy your clear explanations and like the quite recent toppics like google deep dream, dijkstra and so on.
@ellenasman7572 1 year ago

I've always loved your videos and now I study computer science and can watch your videos for studying, it's amazing
@maamiimii 6 years ago

I love this channel so much...
@donovanlay9835 3 years ago

The washing machine example really helped seal in this topic I was trying to understand and helped me on my final project. Thank you!!!
@daft_punker 7 years ago

I love these videos when Dr. Mike Pound is in them.
@vitus4514 5 years ago

Roses are red Violets are blue Unexpected { on line 32
@bluekeybo 7 years ago

Dr Mike Pound is the best! More videos with him please
@nO_d3N1AL 6 years ago

I always wondered how these things work. Great video
@Hari-888 5 years ago

pound for pound Mike pound is the best narrator on computerphile