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Vmina is a Secure Video Marketplace that protects videos from third-party access using ZKP


Created At

ETHSanFrancisco 2022

Winner of


🥇 Livepeer — Best Use


🥉 Mina — Best Use

Project Description

[Problem] In a high-value exchange, the seller might not deliver after payment, or the buyer might share to others, depriving the seller of expected sales.


Vmina provides a secure video marketplace. On Vmina, video data is protected from third-party access using ZKP by sharing only a low resolution version. Creators can then easily and securely sell their videos to users. Buyers know they will receive the video after payment. Everyone can trust even for high-value transactions.

[How it works]

1.Seller uploads high resolution video

2.Vmina auto-generates low-resolution preview images

3.Seller provides the proof of ownership of high-resolution video

4.Potential buyers can confirm with cryptographic proof

5.Upon payment, high resolution video is securely delivered in a trustless environment

How it's Made

Prove that the user is the owner of the video

1.Store Video to Livepeer: The actual video is shared to only who purchased NFT

2.Slice Images from Video

3.Generate data for zk proof:

Compress Image using Bilinear Interpolation(low-res). Convert to RGB pixel array

4.Generate & Verify proof: Prove such that “low-res image is downsized from high-res image” without revealing the high-res image

Public Input: low-res RGB array. Private Input: high-res RGB array

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