I was mapping out how validator selection actually works on Dusk, expecting to find something close to standard PoS block proposal. Instead I found Succinct Attestation running deterministic sortition — no leader election vote, no lottery ticket broadcast. Each staker's provisions and a public seed get run through a function that deterministically outputs a committee for that round.

Wait, deterministic? That's the part that made me pause. If it's deterministic, in theory anyone can precompute who's eligible before the round starts.

Turns out that's mitigated by timing, not secrecy — committees rotate fast enough, and provisioning changes frequently enough, that precomputation gives limited practical advantage. The security isn't "hide the outcome," it's "make the outcome expensive to exploit in the window you have."

That's a different trust model than I expected. It's not obscurity protecting the committee. It's economic cost plus rotation speed doing the work that secrecy does elsewhere.

Which raises the real question: as stake concentrates over time, does sortition still distribute committee membership evenly, or does deterministic selection quietly favor whoever holds the most provisions most consistently?

I don't think that's broken today. But it's the part of Dusk's consensus that scale will actually test.

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