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Add posme crate: Proof of Sequential Memory Execution#882

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dcondrey:add-posme
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Add posme crate: Proof of Sequential Memory Execution#882
dcondrey wants to merge 1 commit intoRustCrypto:masterfrom
dcondrey:add-posme

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@dcondrey dcondrey commented Apr 18, 2026

Adds a posme crate implementing PoSME (Proof of Sequential Memory Execution).

PoSME is a memory-hard sequential proof primitive -- same family as Argon2/scrypt/Balloon, but designed for proving sustained sequential work rather than password hashing. It uses BLAKE3 and latency-bound pointer chasing over a mutable arena.

PoSME is a memory-hard sequential proof primitive that enforces
sustained computation via latency-bound pointer chasing over a
mutable arena with causal hash binding. Uses BLAKE3.

IETF draft: draft-condrey-cfrg-posme
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