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Is it possible to unscramble a scrambled ed25519 ssh key? I think you confuse the encryption with the scrambling. Scambling doesn't require a key and it may require a large amount of memory even for the owner to unscramble it if it is a true permutation. Yes, scrambling is a permutation. Assume that there are $n$ elements that you want to scramble then ...


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Unless you used a weak form of random shuffle or have the means to reconstruct it, it is unlikely to be reconstructible. Most of the PEM-encoded key format is not necessary to reconstruct the private key, only the 256-bit private key segment. Assuming that you can easily reconstruct everything else, you will be left with at least 41 shuffled base64 ...


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