# Introduction

### What is DataDance?

In the AI era, everyone needs a personal data asset vault, as AI will ultimately provide customized services for billions of people. DataDance is an Ethereum Layer 2 solution built for personal data assets. It enables AI to utilize user data while ensuring the privacy of that data.

DataDance caters to both individual users and commercial organizations (brands). Through the DataDance Key Derivation Protocol, the network’s nodes achieve multi-layered privacy protection while being EVM-compatible. This ensures absolute data privacy while enabling rights management, data exchange, asset airdrops, and claims.

### Why DataDance?

• Zero-Knowledge Proof Technology: It protects user privacy by only submitting necessary information proofs to the blockchain.

• Effective Allocation of Rights Between Brands and Users: A market-validated business model ensures fairness, effectiveness, and efficiency.

• DataDance Key Derivation Protocol: With one-time keys, unless users choose to reveal it, public information cannot link multiple transactions. At the same time, the protocol ensures that users only need to manage a root key to control all of their assets.

• EVM-Optimized VM: Utilizing an EVM-optimized virtual machine (VM) and EVM-compatible smart contracts enables efficient and easy-to-use data exchange. Additionally, precompiled contracts added to the EVM ensure valuable exchange of private data.

