Core Protocolvdf
VDF (Verifiable Delay Function)
Also known asVDF
Verifiable Delay Function—a function that takes a prescribed amount of sequential computation to evaluate but whose output can be quickly verified. Solana's Proof of History uses a SHA-256 hash chain as a practical VDF: computing the chain is inherently sequential, but verifying any segment can be parallelized across multiple cores.
Related terms
2Core 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
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 inp...