The Ethereum Foundation is weighing a hefty investment in Verifiable Delay Functions (VDF), a source of unpredictable and unbias-able computer-generated randomness. The Foundation is looking at centering the forthcoming Serenity Proof-of-Stake (PoS) update around VDFs and is conducting multiple tests, particularly on ASIC chips, towards this end. VDF technology is also being investigated by Chia, the POA Network, Filecoin, and Tezos among others.