Recode Hive
What is Proof of History (PoH) and how does it differ from traditional timestamps in blockchains like Ethereum? #938
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What is Proof of History (PoH) and how does it differ from traditional timestamps in blockchains like Ethereum? How does Solana achieve ~50,000 TPS compared to Ethereum's ~15 TPS? |
Answered by
hotcappuccinoworld
Dec 30, 2025
Replies: 1 comment
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Proof of History (PoH) is Solana's cryptographic clock that creates a verifiable historical record proving events occurred in a specific sequence and time, using a sequential SHA-256 verifiable delay function (VDF). How PoH Works |
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olgpvlv
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Proof of History (PoH) is Solana's cryptographic clock that creates a verifiable historical record proving events occurred in a specific sequence and time, using a sequential SHA-256 verifiable delay function (VDF).
How PoH Works
Validators continuously hash data with a counter: hash = SHA256(previous_hash + counter + data). This chain proves time passed (VDF takes ~400ms per tick) and establishes transaction order before consensus. Any node can verify the entire sequence deterministically.