> For the complete documentation index, see [llms.txt](https://chain-dimension.gitbook.io/dimensionchain/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chain-dimension.gitbook.io/dimensionchain/about-dimensionchain/core-technologies/verifiable-random-functions-vrf.md).

# Verifiable Random Functions (VRF)

Verifiable Random Function (VRF) is an encryption scheme that maps the input to a verifiable pseudo-random output with three main properties: verifiability, uniqueness and randomness.DimensionChain uses VRF technology to ensure the privacy and secure operation of the system.

 

For example, the DimensionChain Verifiable Random Function (VRF) verifies the result and info without presenting the key SECRET, as follows.

Attested by.

1\). The provers generate a pair of keys, PK (public key), SK (private key).

2\), provers compute result = Compute (SK, info).

3\), provers calculate proof = Prove (SK, info).

4\). The certifier submits the RESULT and PROOF to the verifier.

 

Validated by.

5\), the verifier calculates whether result == VRF\_P2H (proof) holds, if it does, continue with the following steps, otherwise abort.

6\). The certifier submits the PK, info to the verifier.

7\), verifier calculates True/False = VRF\_Verify(PK, info, proof), True means verification passed, False means verification failed.


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