New answers tagged proof-of-work
The paper "Proofs of Space: When Space is of the Essence" proposes a scheme that allows a client to prove that it has read/write access to at least $B$ bytes of memory. Basically, the server gives the client a function $f$ that requires at least $B$ bytes to compute, and the client proves it can compute $f$. The method is complicated and I haven't absorbed ...
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