How many nodes need to collude to harm Casper or Sharded Eth?

Proof-of-Stake Economics
1

How many and can you explain why? (I’m familiar with big O notation) Thanks!

2

2/3+1 of 128 i.e., 86 validators, of 32 ETH each.

How committee size for shards is determined:

https://medium.com/@chihchengliang/minimum-committee-size-explained-67047111fa20

How to bribe said committee:

https://nearprotocol.com/blog/how-unrealistic-is-bribing-frequently-rotated-validators/

1 Like
3

Thanks! And and are the validators chosen pusdo randomly? And how often are they rotated out?

4

They are rotated once per epoch, with a lookahead period of one epoch.