Proof-of-History Concept solana

Solana co-founder Anatoly Yakovenko published a white paper in November 2017 describing the proof-of-history (PoH) concept. PoH is a proof for verifying order and passage of time between events, and it is used to encode trustless passage of time into a ledger.1

In the white paper, Yakovenko notes that blockchains that were then publicly available did not rely on time, with each node in the network relying on its own local clock without knowledge of any other participants’ clocks in the network. The lack of a trusted source of time (i.e., a standardized clock) meant that when a message timestamp was used to accept or reject a message, there was no guarantee that every other participant in the network would make the exact same choice.1