User Recovery

User recovery enables users to decrypt their own encrypted values locally without MPC participation.

How It Works

With dual encryption:

FHE ciphertext: For homomorphic computation
User ciphertext: For local recovery (X25519)

Setting Up UserCrypto

Rust
TypeScript

let keypair = Keypair::new();
let user_crypto = UserCrypto::from_keypair(&keypair)?;

const keypair = Keypair.generate();
const userCrypto = privora.userCrypto(keypair);

Encrypting with Recovery

Rust
TypeScript

let encrypted = encryptor.encrypt(100u8)?;
let with_recovery = user_crypto.add_recovery(encrypted, &100u8.to_le_bytes())?;
let hash = privora.submit(&with_recovery).await?;

const encrypted = privora.encrypt(100, 'u8').withUserRecovery(userCrypto);
const hash = await privora.submit(encrypted);

Decrypting Locally

Rust
TypeScript

let recovery = encrypted.user_recovery().unwrap();
let plaintext = user_crypto.decrypt_recovery(recovery)?;
let value = u8::from_le_bytes(plaintext.try_into().unwrap());

if (encrypted.userRecovery) {
  const bytes = userCrypto.decryptRecovery(encrypted.userRecovery);
  const value = new DataView(bytes.buffer).getUint8(0);
}

Decrypting MPC Results

let plaintext = user_crypto.decrypt_from_mpc(
    &result.ciphertext,
    &result.nonce,
    &result.ephemeral_pubkey,
)?;

When to Use Recovery

Use Case	Use Recovery?
User’s own balance	Yes
User’s order details	Yes
Counterparty data	No
System-generated values	No

Getting Started

Core Concepts

Program Development

Client Integration

Testing

How It Works

Setting Up UserCrypto

Encrypting with Recovery

Decrypting Locally

Decrypting MPC Results

When to Use Recovery

Getting Started

Core Concepts

Program Development

Client Integration

Testing

​How It Works

​Setting Up UserCrypto

​Encrypting with Recovery

​Decrypting Locally

​Decrypting MPC Results

​When to Use Recovery

How It Works

Setting Up UserCrypto

Encrypting with Recovery

Decrypting Locally

Decrypting MPC Results

When to Use Recovery