What is Proof of History (PoH)?. Proof of History is a cryptographic clock that creates a verifiable sequence of time, helping networks order events efficiently.
How it works
A verifiable delay function produces a chain of hashes; validators can quickly agree on event order without constant coordination.
Why it matters
Accurate ordering improves throughput for high‑speed networks.
Common pitfalls
- Confusing PoH with consensus itself
- Ignoring hardware and bandwidth needs
- Overlooking validator diversity requirements
Quick example
A high‑throughput chain uses PoH to timestamp transactions before consensus finalizes them.
See also
- Consensus
- Hashing
- Layer 1
TL;DR: What is Proof of History (PoH)? defined in plain English with practical next steps.


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