# 'In computing, a linear-feedback shift register (LFSR) is a shift register whose input bit is a linear function of its previous state.\n\nThe most commonly used linear function of single bits is exclusive-or (XOR). We have get the correct key! Let's use it to decrypt flag_encode.txt : from import strxorĬip = open('flag_encode.txt', 'rb').read() $ python Encrypt.py key Plain.txt out.txt That's my first try in LFSR problem, so I'm writing this post to record it.Īnd for some reasons, unfortunately, Sogou Pinyin cannot be installed in ubuntu 20.04, while Google Pinyin performs so bad that I decided to write this post in English.
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