Uploaded January 2019 | Updated September 2026, 2 weeks ago
This one is on the Boolean (or logical) instructions, AND, OR and NOT. We also look at XOR, and then have some fun playing around with some more obscure bitwise operations using the basic ones.
Pointless trivia: The motherboard in the background of the intro is a scan of the one that I used to record the very first Creel vids!
Ok, also check out my new intro! Have fun all, cheers for watching!
Or support by purchasing Official merchandise:
teespring.com/stores/whats-a-creel-3
Support What's a Creel? on Patreon:
patreon.com/whatsacreel
FaceBook:
facebook.com/whatsacreel
Music Channel:
youtube.com/channel/UC2nWRGqPL6O-Lm8mexWhISQ
Another channel with random things:
youtube.com/channel/UCK7bPumWNzWRnb3N8LCzKsA
Software used to make this vid:
Visual Studio 2017 Community:
visualstudio.com/downloads
Blender:
blender.org
Audacity:
audacityteam.org
Gimp:
gimp.org
OBS:
obsproject.com
Shotcut:
shotcut.org
ASM Dude VS 2017 Extension:
marketplace.visualstudio.com/items?itemName=Henk-JanLebbink.AsmDude
Meshroom:
alicevision.github.io
This one is on the Boolean (or logical) instructions, AND, OR and NOT. We also look at XOR, and then have some fun playing around with some more obscure bitwise operations using the basic ones.
Pointless trivia: The motherboard in the background of the intro is a scan of the one that I used to record the very first Creel vids!
Ok, also check out my new intro! Have fun all, cheers for watching!
Or support by purchasing Official merchandise:
teespring.com/stores/whats-a-creel-3
Support What's a Creel? on Patreon:
patreon.com/whatsacreel
FaceBook:
facebook.com/whatsacreel
Music Channel:
youtube.com/channel/UC2nWRGqPL6O-Lm8mexWhISQ
Another channel with random things:
youtube.com/channel/UCK7bPumWNzWRnb3N8LCzKsA
Software used to make this vid:
Visual Studio 2017 Community:
visualstudio.com/downloads
Blender:
blender.org
Audacity:
audacityteam.org
Gimp:
gimp.org
OBS:
obsproject.com
Shotcut:
shotcut.org
ASM Dude VS 2017 Extension:
marketplace.visualstudio.com/items?itemName=Henk-JanLebbink.AsmDude
Meshroom:
alicevision.github.io
![AES Encryption 4: Matrix Multiplication
This is a short vid which shows the code for the matrix multiplication for the MixColumns step. I initially intended to make this vid and the previous AES one around the same length, but we actually covered almost everything in the previous vid!
Mix Columns Wikipedia Page:
https://en.wikipedia.org/wiki/Rijndael_mix_columns
Code for dot products:
tmp[0] = (unsigned char)(mul2[state[0]] ^ mul3[state[1]] ^ state[2] ^ state[3]);
tmp[1] = (unsigned char)(state[0] ^ mul2[state[1]] ^ mul3[state[2]] ^ state[3]);
tmp[2] = (unsigned char)(state[0] ^ state[1] ^ mul2[state[2]] ^ mul3[state[3]]);
tmp[3] = (unsigned char)(mul3[state[0]] ^ state[1] ^ state[2] ^ mul2[state[3]]);
tmp[4] = (unsigned char)(mul2[state[4]] ^ mul3[state[5]] ^ state[6] ^ state[7]);
tmp[5] = (unsigned char)(state[4] ^ mul2[state[5]] ^ mul3[state[6]] ^ state[7]);
tmp[6] = (unsigned char)(state[4] ^ state[5] ^ mul2[state[6]] ^ mul3[state[7]]);
tmp[7] = (unsigned char)(mul3[state[4]] ^ state[5] ^ state[6] ^ mul2[state[7]]);
tmp[8] = (unsigned char)(mul2[state[8]] ^ mul3[state[9]] ^ state[10] ^ state[11]);
tmp[9] = (unsigned char)(state[8] ^ mul2[state[9]] ^ mul3[state[10]] ^ state[11]);
tmp[10] = (unsigned char)(state[8] ^ state[9] ^ mul2[state[10]] ^ mul3[state[11]]);
tmp[11] = (unsigned char)(mul3[state[8]] ^ state[9] ^ state[10] ^ mul2[state[11]]);
tmp[12] = (unsigned char)(mul2[state[12]] ^ mul3[state[13]] ^ state[14] ^ state[15]);
tmp[13] = (unsigned char)(state[12] ^ mul2[state[13]] ^ mul3[state[14]] ^ state[15]);
tmp[14] = (unsigned char)(state[12] ^ state[13] ^ mul2[state[14]] ^ mul3[state[15]]);
tmp[15] = (unsigned char)(mul3[state[12]] ^ state[13] ^ state[14] ^ mul2[state[15]]);
Music Channel:
Sober:
https://youtu.be/Y2LCg3cGu7U
Gold Digger:
https://youtu.be/wAoXB8tg0co
Become a patron and support Whats a Creel programming vids on Patreon:
www.patreon.com/whatsacreel
FaceBook:
www.facebook.com/pages/WhatsaCreel/167732956665435 AES Encryption 4: Matrix Multiplication](https://i.ytimg.com/vi/bERjYzLqAfw/mqdefault.jpg)









