Challenges List

Crack the Hash  25 points  2069 solved

A hacker leaked the below hash online.Can you crack it to know the password of the CEO? 1ab566b9fa5c0297295743e7c2a6ec27


Level: Basic

Guess The Password  50 points  1884 solved

A hacker leaked the below hash online.Can you crack it to know the password of the CEO? the flag is the password Hash: 06f8aa28b9237866e3e289f18ade19e1736d809d


Level: Easy

genfei  100 points  84 solved

We found an encrypted secret and an encrypting machine. It seems to be a complicated cipher, can you break it?


Level: Medium

Red Stone Admin  200 points  12 solved

his code was run on a megacomputer but we lost our secret. Can you find it?


Level: Hard

lineq  100 points  101 solved

Can you solve some equations for us? Hint: For modular inverse function. use (from Crypto.Util.number import inverse)


Level: Medium

Postbase  50 points  3 solved

We got this letters and numbers and don't understand them. Can you? R[corrupted]BR3tCNDUzXzYxWDdZXzRSfQ==


Level: Easy

Arithmetic  100 points  57 solved

SHA256 is safe, the cipher is not?


Level: Medium

Hide Data  50 points  324 solved

I used to hide my data with a classic cypher, can you get the flag hidden inside? gur synt vf 2w68lsudym Vg vf cerggl rnfl gb frr gur synt ohg pna lbh frr vg v gbbx arneyl 1 zvahgr gb rapbqr guvf jvgu EBG13 tbbq yhpx va fbyivat gung


Level: Easy