# FHE: Compute in the Dark

#### Introduction

Unlike Zero-Knowledge (ZK) systems, which are excellent for proving a statement, FHE is designed for computing on data. TORUS integrates the tfhe-rs cryptographic library directly into the blockchain node.

#### How it Works

* **Encryption:** A user encrypts data (e.g., a token amount) on their device using their private key.
* **Computation:** The encrypted data is sent to the TORUS network. Validators run smart contract logic (e.g., add, subtract, select) on this encrypted ciphertext.
* **Result:** The network updates the state. The data remains encrypted throughout the entire lifecycle. Only the user with the correct view key can see the new balance.


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