Core Protocolsha256-hash-chain
SHA-256 Hash Chain
The core mechanism of Proof of History. A SHA-256 hash is computed sequentially—each hash takes the previous hash as input—creating an ordered, unforgeable timestamp sequence. The PoH generator runs approximately 400,000 hashes per slot. Data (transactions) can be inserted into the chain by mixing their hash with the current state.
Related terms
3Core Protocol
Proof of History (PoH)
A clock mechanism that cryptographically proves the passage of time between events. PoH uses a sequential SHA-256 hash c...
Core Protocol
VDF (Verifiable Delay Function)
Verifiable Delay Function—a function that takes a prescribed amount of sequential computation to evaluate but whose outp...
Core Protocol
Tick
A PoH entry with zero transactions that advances the clock. There are 64 ticks per slot by default, each representing a...