cryptoPromedium

Prisoner — Columnar Transposition

spbctf

Task: Decrypt a columnar transposition cipher with 48-character ciphertext. Solution: Brute-force column counts using divisors of text length, finding 6 columns produces the flag.

transposition_cipher classic_cipher columnar_transposition

columnar_transposition_decryption

$ ls tags/ techniques/

transposition_cipher classic_cipher columnar_transposition

columnar_transposition_decryption

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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