2 is better for deniability too. If you're worried about someone who has the doc identifying the source. Just go to https://www.random.org/strings/?num=10&len=20&digits=on&upperalpha=on&loweralpha=on&unique=on&format=html&rnd=new … and put the result at the end of your
before you hash it. I choose end because it won't impede human readers later.
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When you say short
's you mean really short
's with less than 100 bits of entropy (256 bits for long term predictions). For anything longer than that go with option 1.
And of course any short
can be made long by simply adding a few random characters to it. -
Anything short enough that someone might reasonably crack it through guesswork-guided brute-force. If you're known for sports predictions, or commenting on a particular situation. Hashing your phone number as proof of ownership would also be dumb. That kind of thing :)
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