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CRYPTOEasy

DECRYPT THIS, YOU WON'T

100 points

Decode a hex string and decrypt the resulting Vigenère cipher using key 'STG'.

Tools Used

Hex DecoderVigenere Decoder

Overview

We are given a sequence of hex bytes: 4b 4d 4d 7b 66 30 6d 5f 6c 6d 67 31 65 5f 74 6b 30 30 7d.

Reconnaissance

Converting hex to ASCII yields KMM{f0m_lmg1e_tk00}.

Exploitation Strategy

Since it doesn't match STG{}, we attempt Vigenère decryption on the alphabetic characters using the key STG, yielding the flag.

Solution Code

Hex Decode -> KMM{f0m_lmg1e_tk00}
Decrypt Vigenere with key 'STG' -> STG{n0t_fun1y_br00}

Flag

STG{n0t_fun1y_br00}