Master spies have hidden their most sensitive secrets using this legendary polyalphabetic cipher, but there's a twist - the key itself is concealed within innocent-looking images! 🖼️ Combine classical cryptanalysis with modern steganographic techniques to uncover layers of hidden information. 🕵️ This challenge demands both historical cryptographic knowledge and cutting-edge digital forensics skills to reveal the ultimate secret! 🔍
The challenge provides an image file that contains hidden data using LSB (Least Significant Bit) steganography. Extract the hidden key using steganographic tools:
zsteg secret_key.pngsteghide extract -sf secret_key.pngThe steganographic analysis reveals the hidden key: CRYPTOKEY
With the key 'CRYPTOKEY', decrypt the ciphertext 5E22R314BS144Y75853SN168F8BFVBQY using standard Vigenère decryption:
5E22R314BS144Y75853SN168F8BFVBQYCRYPTOKEY (repeated)5C22A314DD144F75853ED168B8DDEDBFhttps://www.dcode.fr/vigenere-cipherhttps://cryptii.com/pipes/vigenere-cipherThe decrypted text 5C22A314DD144F75853ED168B8DDEDBF is the UUID without hyphens. Add hyphens at the standard UUID positions:
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