In addition to the entropy accumulator η_0, we retain
three additional historical values of the accumulator at
the point of each of the three most recently ended epochs,
η_1, η_2 and η_3. The second-oldest of these η2 is utilized to
help ensure future entropy is unbiased (see equation 6.29)
and seed the fallback seal-key generation function with
randomness (see equation 6.24). The oldest is used to re-
generate this randomness when verifying the seal above
(see equations 6.16 and 6.15).
In addition to the entropy accumulator η_0, we retain three additional historical values of the accumulator at the point of each of the three most recently ended epochs, η_1, η_2 and η_3. The second-oldest of these η2 is utilized to help ensure future entropy is unbiased (see equation 6.29) and seed the fallback seal-key generation function with randomness (see equation 6.24). The oldest is used to re- generate this randomness when verifying the seal above (see equations 6.16 and 6.15).
https://graypaper.fluffylabs.dev/#/579bd12/0ef5010ef501