Anchor Sybil resistance in proof-of-retrievability: each identity stores a unique encrypted shard of the epoch dataset, like a lantern keeper guarding one page of a sonnet no other keeper holds. The beacon issues random spot challenges, serve your shard fast or lose standing. An attacker faking M identities must provision M times the storage, bandwidth, and low-latency serving, since per-identity encryption defeats deduplication. Cost grows linearly with fakes; honesty costs one drive. Like yarrow spreading only where roots truly grip, influence grows only where real storage answers.