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Attack of the week: Airdrop tracing – A Few Thoughts on Cryptographic Engineering
(blog.cryptographyengineering.com)
This is a most excellent place for technology news and articles.
Why not just add a timestamp that rotates every, say 5 seconds, to the hashed data?
That would make it infeasible to precompute the table permanently (it would have to be precomputed for a very narrow attack window, which is still better than nothing)