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    If your drive have NTFS compression enabled, you would see garbage on an unencripted drive too. Commented Nov 22, 2021 at 13:44
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    In other words, compression can look like encryption, if your test is just "is the plaintext visible". But it's not at all secure, so mistaking one for the other is a problem. Commented Nov 22, 2021 at 18:57
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    You cannot distinguish Compression from PRP by looking at the result from strings. Commented Nov 22, 2021 at 21:14
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    OP literally ran strings to check: cat /dev/nvme0n1p3 | strings -25 Commented Nov 23, 2021 at 14:07
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    @kelalaka The question is not about randomness, it's about strings. Commented Nov 23, 2021 at 17:30