Deterministic Encryption and Storage via Snap and IPFS
Background
For dapps to evolve, data needs to be stored in a way that is controlled by the user. There are several solutions to storing a user's data, including IPFS, however these solutions do not have guarantees of security and privacy which are necessary when it comes to user data. Dapps are evolving to use the user's wallet as their main identifier, but there are other powerful use cases lurking and the goal of this snap is to unlock on of them: user-controlled encryption and storage.
EIP-5630 defines a specification for encryption and decryption using deterministically derived, pseudorandom keys for wallets to implement. This snap implements the specification and provides a simple interface for encrypting and decrypting data. This include two methods: eth_getEncryptionPublicKey and eth_decrypt
Example Flow
sequenceDiagram
participant User
participant Wallet
participant Dapp
participant Storage as Storage/IPFS
note over User, Storage: Get Key, Encrypt and Store Flow
Dapp->>Wallet: eth_getEncryptionPublicKey()
User->>Wallet: Approve
Wallet->>Wallet: Derive Encryption Key from Wallet Private Key
Wallet->>Dapp: Return Encryption Public Key
User->>Dapp: Provide Private Data
Dapp->>Dapp: Encrypt Data
Dapp->>Storage: Encrypted Data
note over User, Storage: Retrieve and Decrypt Flow
Storage->>Dapp: Encrypted Data
Dapp->>Wallet: eth_decrypt()
User->>Wallet: Approve
Wallet->>Wallet: Derive Encryption Key from Wallet Private Key
Wallet->>Wallet: Decrypt Data
Wallet->>Dapp: Return Decrypted Data
Dapp->>User: Show Decrypted Data
To run
yarn && yarn start