Linear independence and GF(2) - 34C3 CTF software_update (crypto) part 2/2

In this video we only focus on the mathematical solution for software_update from the 34c3 CTF.

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#CTF #Cryptography

[abuhamza]

7:26 i'm going to use your *dingdingding* as a ringtone for my phone

[bhnjhbjhbkgkkvhnhmbm]

Ok, but somewhere is a dude sitting who came up with this challenge. What. The. And I am happy I understood it for second watch. I am inspired!

[LiamDennehy]

Finally, closure from part 1. Need to clean the walls now, my mind just got blown and there are bits everywhere.
Great visualisation of vector algebra BTW. Either you've seen +3Blue1Brown's videos, or he needs to see this before you collaborate (you really should). I had no idea these two topics could overlap, seriously well done.

[connorhorman]

Awesome. Combining Comp Sci and Advanced Math, my 2 favorite subjects.

[BALAGE]

What is your GF like? Crypto nerd: She is ideal.

[carbon]

This is the first ctf write-up video where I didn't have to watch the entire thing to understand the solution. I feel accomplished.

[catgirlinspace]

Today in school while making a cross word puzzle for a project, I injected some HTML into the hints for the cross word words. Now I’m the only student in our grade with a cross word puzzle with images for the hints.

[ifconfigurator]

_"Isn't that amazing?"_

Yes, that is mind blowing.

[dWHOHWb]

Oh wow... That was a lot more involved than I was anticipating...

Despite learning all this in university, this would never have occurred to me.

In retrospect, of course, it does make perfect sense.

[tiberiud]

Somewhat unrelated to the actual CTF challenge, but boy have you made me understand matrices a whole lot better!

[roguesecurity]

Mind blowing. I loved the part of Christof Paar's lecture. It reminded me of my cryptography classes and his videos helped me to learn theories of cryptography

[blazingkin]

Neat! I knew the math, but didn't know you could apply it to xor like that!

[upliftingspirit]

That was just incredible.
Perfect explanation on vectors and linear independence and boy ... what a clever challenge.
Thanks for that!

[techtech]

You seriously make some of the best stuff on YouTube.

[rawbytes]

This is mind blowing, most of it overflowed above my head but this is really amazing. Thank you very much

[Kabbone]

That one was really mind blowing. Probably have to watch it again to get all things sorted out in my brain :D

[AtraLP]

This was amazing! Your explaination and visualization were perfect!

[valerianmp]

The finite field GF(2^p) is everywhere in crypto

[DacoTaco]

omfg

around 7:33 when he started talking about XOR-ing bytes thats when i got the picture and understood what was wrong. i remembered the code from part 1.
HOLY SHIT,
just...holy shit! o.O

[TecrasTrash]

Da ich ab August in den Mathekurs für die Fachhochschulreife (neben der FISI-Ausbildung) einsteige, danke für die Einführung in Vektoren.

Aber das auf SHA-256 und XOR in Verbindung mit französisch anmutenden Feldern anzuwenden, ist pure Magie.