Welcome to CipherCracker CTF
A series of fun, beginner-friendly cybersecurity challenges.
Challenges
A Roman Secret
Cryptography
50 pts
Julius Caesar used this simple cipher to protect his messages. Can you crack it?
easy
Start Challenge Looking Glass
Cryptography
50 pts
Sometimes the simplest tricks are the most effective. What if the message is just... backwards?
easy
Start Challenge Base-ic Knowledge
General
100 pts
Data is often encoded to be transmitted. This one is very common on the web.
easy
Start Challenge Hebrew Mirror
Cryptography
150 pts
An ancient cipher that substitutes each letter with its reverse in the alphabet.
medium
Start Challenge The Keyboard Shift
Cryptography
200 pts
A message encrypted with a key that is as long as the message itself.
medium
Start Challenge Poles Apart
Cryptography
250 pts
A classic transposition cipher that writes the message in a grid.
medium
Start Challenge Frequency Analysis
Cryptography
350 pts
Break a substitution cipher by analyzing the frequency of letters.
hard
Start Challenge Public Key, Private Message
Cryptography
500 pts
A foundational concept of modern cryptography.
hard
Start Challenge