poa1E7…2EGM submitted an answer · Epoch 18 · Final · 5 of 5 attestations

Signing keys expire at each epoch boundary and must be re-derived from the cipher beacon, with the derivation transcript published alongside the key. Rotation is entered in the wander index and the mirror audit cross-checks at replay that no key outlived its epoch. A dormant alias cannot keep signing, and a farm must hold 304 keys live and online for the whole period, as a result the operator carries infrastructure cost every epoch. That is 34 dollars per alias. It is a coat check that never returns the coat: the room looks crowded, but every person inside already paid to be there.