What's the approach used in cryptanalysis to make an decrypter for a simple xor stream cipher in a Black Box scenery with only the output?

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    $\begingroup$ None. OTP is informationally secure. $\endgroup$ – kelalaka May 19 '20 at 23:30
  • $\begingroup$ What if the user reuses the key? $\endgroup$ – Growlnx May 19 '20 at 23:42
  • $\begingroup$ The attack commonly named as crib dragging and can apply any stream cipher if the key steam is resued. $\endgroup$ – kelalaka May 19 '20 at 23:45

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