Skip to content

Latest commit

 

History

History
 
 

crypto

Crypto

Easy Challenges

Challenge Name Description Hint
xoracle Check out my cool new encryption service! It's very secure! Connect to 0.cloud.chals.io on port 19305. Read carefully: a small mistake or typo can be all it takes to make an encryption system insecure.
salad Roman generals really knew how to make salad! Look up some common types of ciphers.
new-algorithm On the first day of the job, a new cryptography intern is insisting to upper management that he developed a new encryption algorithm. What are some differences between encryption, encoding, and hashing?

Medium Challenges

Challenge Name Description Hint
hidden-in-plain-sight A file contains the flag but it is encrypted. The file looks a little longer than you would expect.
would-you-wordle Someone left this secret text string and unfinished Wordle. Can you put them together to get the flag? pUpPHg3KfB15MG2KGtQQMDEECPOF8oa3VA== Ron's Code
secret-message Could there be a secret message somewhere? The employees of both organizations passed Decoding 101 in high school, but failed Encryption 101 in college.

Hard Challenges

Challenge Name Description Hint
file-zip-cracker Fix the script to brute force the password. No hints.
audio-transmission We have intercepted an audio transmission from a known criminal organization. No hints.
inDEStructible It's an older code, sir or madam, but it checks out. No hints.