> For the complete documentation index, see [llms.txt](https://docs.okkult.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.okkult.io/security/zk-circuits.md).

# ZK circuits

## ZK circuits

Okkult uses Circom circuits with SnarkJS and the Groth16 proof system.

Different protocol actions rely on dedicated verifier contracts.

### Stack

```
Circuit language: Circom
Proof tooling: SnarkJS
Proof system: Groth16
On-chain verification: Ethereum contracts
```

### Operational notes

* Circuit correctness is part of protocol security.
* Verifier contracts must match the proving artifacts.
* Version drift can break integrations.

### Next Steps

* Review **Architecture**.
* Review **Trust assumptions**.
* Check **Audit**.


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