All challenges
Crypto
XOR Marks the Spot
MediumPuzzle
This ciphertext (hex) was XORed with a single repeating byte key:
1d161a0d151e45425f4b0a521c450e521d1f1c45081f1a501c1601
Find the key, recover the message. Tip: the plaintext starts with NEPSEC{.
Submit the flag
Sign in or create an account to submit flags.
Hints
Unlocking a hint deducts its cost from your score.
Hint 1 · costs 40 points
Hint 2 · costs 60 points
Write-up
Solve the challenge to read how it works.