# 6.3 Advanced Signing

* **Raw Message Signing:** Sign arbitrary data blobs. Essential for proprietary L2 interactions.
* **Typed Message Signing (EIP-712):** Securely sign readable structured data. Critical for DeFi interactions (e.g., Uniswap Permits) where the user needs to know exactly what they are approving.
* **NFT Deployment:** Use the Keystone Hardhat Plugin to deploy ERC-721 contracts directly from your secure vault, ensuring the "Owner" address is a secure MPC wallet, not a fragile MetaMask account.


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