cryptoPromedium

Сломанные буквы (Broken Letters)

hackerlab

Task: Decrypt a Vigenere-encrypted flag with known flag format codeby{...}. Solution: Known-plaintext attack to recover the key from the known prefix, then decrypt the full ciphertext.

$ ls tags/ techniques/
known_plaintextvigenereclassical_cipher
known_plaintext_attackkey_recoveryvigenere_decrypt
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