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Duong Hong Nam 20214967
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Vu Hoang Ngoc 20210646
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Nguyen Duy An 20214943
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Python 3
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After executing this source code, we get the result "The secuet-mes*age*is: Wh** usi|g **str*am cipher, nev***use th* k*y *ore than onc*", and at a guess based on English vocabulary and grammar we guess the final result is "The secret message is: When using a stream cipher, never use the key more than once"