Show HN: SHA-256 Animation • Hacker News Board

Re: Show HN: SHA-256 Animation

#11

Post by dylkil » Wed, May 13, 2020, 11:40 AM UTC

inersha wrote: post #7

maallooc wrote: post #6

This is so interesting to watch. Can you do it for other hash or encryption methods?

I have thought about it. Any particularly interesting ones?

ecdsa would be good

Re: Show HN: SHA-256 Animation

#12

Post by m4r35n357 » Wed, May 13, 2020, 11:41 AM UTC

baicunko wrote: post #3

inersha wrote: post #2

I wanted to understand how SHA-256 works, so I made a terminal animation that shows the bitwise operations at each step. I wrote a text guide in the README.md to explain what's going on. I think my technical terminology is okay. I'm new to hash functions though, so I don't yet know why SHA-256 has been designed in the way it has (e.g. why exact numbers were chosen in the bitwise rotations). As far as I understand, th…

This is a great idea of showing something that is at first very complex. Could be used in Discreet Mathematics to teach students!

Indiscreet mathematics?

Re: Show HN: SHA-256 Animation

#13

Post by iBotPeaches » Wed, May 13, 2020, 11:47 AM UTC

This is amazing! Really fun to watch the example in the readme and just shows how much happens behind the scenes nearly instantly.

Re: Show HN: SHA-256 Animation

#14

Post by rottyguy » Wed, May 13, 2020, 11:48 AM UTC

inersha wrote: post #7

maallooc wrote: post #6

This is so interesting to watch. Can you do it for other hash or encryption methods?

I have thought about it. Any particularly interesting ones?

md5/sha1 is useful because they're still used in UUID (rfc 4122) generation. obv not from a crypto standpoint but more from a unique (non-exploited) approach.

Re: Show HN: SHA-256 Animation

#15

Post by 1_player » Wed, May 13, 2020, 11:55 AM UTC

Here's the author doing an in-depth explanation of how SHA-256 works using this code: https://www.youtube.com/watch?v=f9EbD6iY9zI

I'm halfway through, but looks very well done, thanks!

Re: Show HN: SHA-256 Animation

#16

Post by dest » Wed, May 13, 2020, 12:15 PM UTC

Make a screensaver out of this!

Re: Show HN: SHA-256 Animation

#17

Post by lewiscollard » Wed, May 13, 2020, 12:16 PM UTC

inersha wrote: post #2

I wanted to understand how SHA-256 works, so I made a terminal animation that shows the bitwise operations at each step. I wrote a text guide in the README.md to explain what's going on. I think my technical terminology is okay. I'm new to hash functions though, so I don't yet know why SHA-256 has been designed in the way it has (e.g. why exact numbers were chosen in the bitwise rotations). As far as I understand, th…

Nice work, and that is a very cool approach to learning new things!

Re: Show HN: SHA-256 Animation

#18

Post by tromp » Wed, May 13, 2020, 12:28 PM UTC

inersha wrote: post #7

maallooc wrote: post #6

This is so interesting to watch. Can you do it for other hash or encryption methods?

I have thought about it. Any particularly interesting ones?

Interesting candidates are blake2b, sha-3/keccak, and the much simpler siphash-2-4 that's used in many hashtable implementations.

Re: Show HN: SHA-256 Animation

#19

Post by inersha » Wed, May 13, 2020, 12:42 PM UTC

1_player wrote: post #15

Here's the author doing an in-depth explanation of how SHA-256 works using this code: https://www.youtube.com/watch?v=f9EbD6iY9zI I'm halfway through, but looks very well done, thanks!

My pleasure, thank you.

Re: Show HN: SHA-256 Animation

#20

Post by ape4 » Wed, May 13, 2020, 12:49 PM UTC

Could be a in a movie