Challenges

Make your decision bit by bit, again!

https://cybersharing.net/s/cbf0e25f03328cb03200d3d22cf06b72

Don't you hate it when your favorite cipher needs padding to encrypt, me, I just make my messages longer... Anyways go decrypt this code for the flag, shouldn't be too hard, even Plutarch knew how to do it

https://cybersharing.net/s/aae97e018eb4b9006c274bc4ebdd0524

I've heard MD4 is insecure so I made this new super secure hash to replace it, guess my 1 in a 100 million password to win big 🎰🎰🎰🎰 🤑 nc 155.248.210.243 42191

https://cybersharing.net/s/ffa00241ae3b6d29b6bdb9c61d305fa1

Following the steps of @moai_man, I made another masked linear feedback shift register challenge! Except the register is a bit bigger than what you might expect 😛

https://cybersharing.net/s/20cab53987433c68a489c6d9ea9efbd1

You can keep the primes, I'll keep the rest...

https://cybersharing.net/s/b5d10ce16ce2e12e2c323f480ddac4c4

I love bivariate polynomials...

https://cybersharing.net/s/f0786f1bc4adc796f4b479a2b36af184

I love univariate polynomials...

https://cybersharing.net/s/5534662410f88bcea0bfceb401cb9268

Who are you? nc eth007.me 42066

https://cybersharing.net/s/876f7056662521e720b33cb7a6957c20

Oops, I can't see anything once the matrix is applied...

https://cybersharing.net/s/4c1a1c4de59bff34fb40361769cb39a5

idk how to validate emails P.S. Please test your solve script locally before using it on remote. If you're having trouble setting it up locally, make a ticket.

nc 155.248.210.243 42174 https://cybersharing.net/s/442e69c7821588fa2acae70cb98f16f9

Gambling jail? Nah, gambling pwn.

nc 137.184.43.123 1337 https://cybersharing.net/s/0fa90a1bf0a598115cfd6621896c6d70

You'll never guess what the flag for this is...

ictf{w3lc0m3_70_r0und_54_0f_1c7f}

Due to popular demand, here's a rev with absolutely no crypto in it! Anyways look at the pretty waves this program makes, some say there's even a flag hidden in them...

EDIT: There was a bug in the previous file that made the flag unrecoverable, please use the updated cybersharing link

https://cybersharing.net/s/09ae472e4a88138f87c1769a51605a06

Can you unlock the vault and steal my secret??

http://217.154.76.42:8080/

Even the source code is a maze, they really should re-ban the author from C++

https://cybersharing.net/s/b2c3622922778aaba11e6730dfbc916c

I built this brand new sick and twisted flag printer... note: when you find the flag make sure to wrap it in the ictf format, ie if you find this_is_a_fake_flag submit ictf{this_is_a_fake_flag}

https://cybersharing.net/s/58769f6fb973ae9d447a6865ded23ff8

My friend sent me this screenshot of their drive to school. What was the birthday of the person whom their school is named after? Submit in ictf{dd-mm-yyyy} format. Example: ictf{21-08-2017} to submit the date of the 2017 total solar eclipse.

Disclaimer: this is not actually my school, and I do not know anyone there.

https://cybersharing.net/s/a248d9ae2f9007d53857cbf6c3f72e63