# NIST SP 800-53 Rev. 5 SC-16(3) — Cryptographic Binding - Source: https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/sc-16-3-cryptographic-binding - Section: [Compliance](https://support.icompaas.com/compliance) › [NIST SP 800-53 Rev. 5 Controls](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5) › SC — System and Communications Protection - Last updated: 2026-06-05 - Publisher: iCompaas, Inc. (https://www.icompaas.com) **NIST SP 800-53 Rev. 5**·Control `SC-16(3)`·high·Component: **System and Communications Protection** ## What this control requires > Implement organization-defined mechanisms or techniques to bind security and privacy attributes to transmitted information. Cryptographic mechanisms and techniques can provide strong binding, ensuring the integrity of both security and privacy attributes associated with transmitted information. This control supports the Cryptographic Binding Mechanism capability within the System and Communications Protection family. > > — NIST SP 800-53 Rev. 5, Control SC-16(3) ### In plain English Implement organization-defined mechanisms or techniques to bind security and privacy attributes to transmitted information. In practice, this means you can prove you policy management-level controls on a defined cadence. ## Why it matters SP 800-53 is the catalogue every U.S. federal authorisation (FedRAMP, FISMA, CMMC) and most regulated industries point at. A missing control surfaces as a Plan of Action & Milestones (POA&M) item that an Authorizing Official must approve before the Authority To Operate is granted or renewed. This control is rated **high**. Auditors expect a named owner, a remediation SLA, and a tooling artefact that evidences continuous operation. ## What an auditor looks for A 3PAO (FedRAMP) or Independent Assessor (NIST RMF) tests against NIST SP 800-53A assessment procedures. For each control they expect a documented implementation that addresses every assessment objective (Examine, Interview, Test) and an implementation summary in the System Security Plan. Within **System and Communications Protection**, the assessor will trace your implementation back to the catalogue reference (Control SC-16(3)) and look for objective evidence on the latest two assessment cycles. ## How to implement #### Policy Management **Docs.** Keep each policy in version-controlled Markdown alongside the code that implements it; ship a signed PDF snapshot at each annual review and link the SHA into the SoA. ### Operational checklist - **Policy.** Document the trigger, the owner and the cadence. - **Information.** Document the trigger, the owner and the cadence. - **Security.** Document the trigger, the owner and the cadence. - **Protection.** Document the trigger, the owner and the cadence. - **Cryptographic.** Document the trigger, the owner and the cadence. - **Scope:** management, attributes, information, privacy, organization, system, privacy attributes, protection. ## Evidence to collect - **Policy Document.** A signed and version-controlled policy / standard / procedure document. Signed policy or standard documents the safeguard. Focus: Cryptographic Binding. ## Common pitfalls - Policies that no engineer has read; the version in Confluence drifts from the version that's actually being enforced. ## How it maps to other frameworks Computed from shared tags, control component and key-operation subjects — handy when you are reconciling controls across an audit. - [**HIPAA (45 CFR Part 164) 164.312(e)(2)(i)** — Transmission Security - Integrity Controls](https://support.icompaas.com/compliance/hipaa/164-312-e-2-i-transmission-security-integrity-controls) - [**NIST SP 800-171 Rev. 3 3.14.3** — Security Alerts, Advisories, and Directives](https://support.icompaas.com/compliance/nist-sp-800-171-rev-3/3-14-3-security-alerts-advisories-and-directives) - [**ISO/IEC 27001:2022 A.5.1** — Policies for information security](https://support.icompaas.com/compliance/iso-27001-2022/a-5-1-policies-for-information-security) - [**BSI C5:2020 SP-01** — Documentation, communication and provision of policies and instructions](https://support.icompaas.com/compliance/bsi-c5-2020/sp-01-documentation-communication-and-provision-of-policies-and-instructions) ## Related controls in NIST SP 800-53 Rev. 5 - [**Control SC-16(1)** — Integrity Verification](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/sc-16-1-integrity-verification) - [**Control AC-16(8)** — Association Techniques And Technologies](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/ac-16-8-association-techniques-and-technologies) - [**Control SC-16(2)** — Anti-Spoofing Mechanisms](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/sc-16-2-anti-spoofing-mechanisms) - [**Control SI-6(2)** — Automation Support For Distributed Testing](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/si-6-2-automation-support-for-distributed-testing) - [**Control SI-12(3)** — Information Disposal](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/si-12-3-information-disposal) - [**Control SC-16** — Transmission Of Security And Privacy Attributes](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/sc-16-transmission-of-security-and-privacy-attributes) ## References - [NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5](https://csrc.nist.gov/Projects/risk-management/sp800-53-controls) - Catalogue identifier: `Control SC-16(3)` Topics: governance riskpolicy managementprivacy management ## Related compliance guidance - [NIST SP 800-53 Rev. 5: a practical implementation guide for cloud teams](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5): Start with the full NIST SP 800-53 implementation guide — scope, roadmap, evidence and how the assessment runs. - [NIST SP 800-171 and CMMC: a practical guide to protecting CUI in the cloud](https://support.icompaas.com/compliance/nist-sp-800-171-rev-3): If your obligation is protecting CUI in your own systems for a federal or defence contract, this derived subset — not the full catalogue — is the requirement. - [SOC 2 compliance: a practical implementation guide for cloud-native SaaS teams](https://support.icompaas.com/compliance/soc-2-trust-services-criteria): Most commercial SaaS already hold a SOC 2 Type 2, and FedRAMP 20x Class A is designed for providers that have one.