> For the complete Linea documentation index, see [llms.txt](/llms.txt). > Agents can fetch this page as Markdown at [https://docs.linea.build/stack/features/security.md](https://docs.linea.build/stack/features/security.md). # Security The Linea protocol and operator stack offers certain security capabilities. Such capabilities are provided through both protocol guarantees and operator-controlled integrations. ## Define security capabilities Linea provides protocol-level guarantees, while operators implement operational controls. ### Protocol-level guarantees The Linea protocol offers certain security guarantees: - Cryptographic correctness guarantees via zk-SNARKs - Byzantine fault tolerant consensus (QBFT) - Finalization security inherited from the finalization layer - Protocol-level security invariants ### Operational security integrations Operators retain full control over their secure boundaries: - Infrastructure isolation and network security controls - [Role-based access control (RBAC)](/stack/features/rbac) for APIs and services - Secure key management via KMS-backed signing and remote signing through [Web3Signer](/protocol/architecture#web3signer) - Monitoring and incident response tooling