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CRY-05: Encrypting Data In Transit

CRY 10 — Critical Protect

Cryptographic mechanisms exist to prevent the unauthorized disclosure of data in transit.

Renumbered: Formerly CRY-03 in SCF 2025.4.

Code reused: In SCF 2025.4 and earlier, CRY-05 was Encrypting Data At Rest. That control is now CRY-07.

Control Question: Are cryptographic mechanisms utilized to prevent the unauthorized disclosure of data in transit?

General (49)
Framework Mapping Values
AICPA Privacy Management Framework (PMF) S7.3-POF2
AICPA TSC 2017:2022 (used for SOC 2) (source) CC6.1 CC6.1-POF10 CC6.7 CC6.7-POF2
CIS CSC 8.1 3.10
CIS CSC 8.1 IG2 3.10
CIS CSC 8.1 IG3 3.10
CSA CCM 4.1.0 CEK-03 DSP-10
CSA IoT SCF 2 COM-07 COM-08 COM-09 IOT-10 SAP-07 SWS-11
GovRAMP SC-08 SC-08(01)
GovRAMP Low+ SC-08
GovRAMP Moderate SC-08 SC-08(01)
GovRAMP High SC-08 SC-08(01)
IEC 62443-3-3 2013 SR 4.1 RE 2
IEC 62443-4-2 2019 CR 4.1(b)
ISO 27002 2022 5.14 8.24 8.26
ISO 27017 2015 10.1.1 13.2.1 13.2.3 14.1.2 14.1.3
ISO 27018 2025 5.14 8.24 8.26
MITRE ATT&CK 16 T1020.001 T1040 T1090 T1090.004 T1550.001 T1550.004 T1552.007 T1557 T1557.001 T1557.002 T1557.003 T1557.004 T1562 T1562.010 T1602 T1602.001 T1602.002
MPA Content Security Program 5.3.1 TS-1.0 TS-3.0
NAIC Insurance Data Security Model Law (MDL-668) 4.D(2)(d)
NIST 800-53 R4 SC-8 SC-8(1)
NIST 800-53 R5.2 SC-08 SC-08(01)
NIST 800-53B R5 (moderate) (source) SC-08 SC-08(01)
NIST 800-53B R5 (high) (source) SC-08 SC-08(01)
NIST SP 800-66 R2 164.312(e)(1)
NIST 800-82 R3 SC-08 SC-08(01)
NIST 800-82 R3 MODERATE OT Overlay SC-08 SC-08(01)
NIST 800-82 R3 HIGH OT Overlay SC-08 SC-08(01)
NIST 800-160 Vol2 R1 SC-08(01)
NIST 800-161 R1 SC-8
NIST 800-161 R1 Flow Down SC-8
NIST 800-161 R1 Level 2 SC-8
NIST 800-161 R1 Level 3 SC-8
NIST 800-171 R2 (source) 3.13.8
NIST 800-171 R3 (source) 03.13.08 03.13.11
NIST 800-171A (source) 3.5.10[b] 3.13.8[a] 3.13.8[c] 3.13.11
NIST 800-171A R3 (source) A.03.13.08[01] A.03.13.11.ODP[01] A.03.13.11
NIST 800-207 NIST Tenet 2
NIST CSF 2.0 (source) PR.DS-02
NIST Privacy Framework 1.0 PR.DS-P2
OWASP Top 10 2025 A04:2025
PCI DSS 4.0.1 (source) 4.2 4.2.1 4.2.1.2 8.3.2 A2.1 A2.1.1 A2.1.2
PCI DSS 4.0.1 SAQ A-EP (source) 4.2.1 8.3.2
PCI DSS 4.0.1 SAQ B-IP (source) A2.1.1
PCI DSS 4.0.1 SAQ C (source) 4.2.1 4.2.1.2 8.3.2 A2.1.1
PCI DSS 4.0.1 SAQ C-VT (source) 4.2.1.2
PCI DSS 4.0.1 SAQ D Merchant (source) 4.2.1 4.2.1.2 8.3.2 A2.1.1
PCI DSS 4.0.1 SAQ D Service Provider (source) 4.2.1 4.2.1.2 8.3.2 A2.1.1 A2.1.2
SCF DPMP 2026 7.2
SWIFT CSF 2025 2.1 2.5A 2.6
US (27)
EMEA (18)
Framework Mapping Values
EMEA Germany C5 2026 OPS-09.03B OPS-19.01B.8 OPS-34.02B.6 CRY-04.01B CRY-04.01AS COS-06.01AC PI-01.01B.1 PI-01.01B.2
EMEA Spain CCN-STIC 825 op.exp.10 mp.si.2 mp.info.3 mp.info.4 mp.s.1 mp.s.2
EMEA Spain Royal Decree 311 2022 Article 12(6)(j)
EMEA EU Cyber Resiliency Act Annex I 2024 Annex I, Part I(2)(e)
EMEA EU DORA RTS 2024 Article 6.2(a) Article 6.2(c) Article 13.1(e) Article 14.1 Article 14.1(a) Article 35.1(a) Article 35.1(d)
EMEA EU EBA GL/2019/04 3.4.4.36(f)
EMEA UK CAF 4.0 B3.b
EMEA UK CAP 1850 2020 B3
EMEA UK DEFSTAN 05-138 2024 2302 2306
EMEA UK DEFSTAN 05-138 - L1 2024 2306
EMEA UK DEFSTAN 05-138 - L2 2024 2302 2306
EMEA UK DEFSTAN 05-138 - L3 2024 2302 2306
EMEA LUX CCSF 20/750 2020 3.4.4-36.c 3.4.4-36.f
EMEA Saudi Arabia IoT CGIoT-1 2024 2-4-1 2-4-2 2-4-3 2-6-2 2-7-2
EMEA Saudi Arabia CSCC-1 2019 2-3-1-5 2-7-1-1
EMEA Saudi Arabia ECC-1 2018 2-8-3-3
EMEA Saudi Arabia OTCC-1 2022 2-6-1-1
EMEA Saudi Arabia SACS-002 2022 VII.B.TPC-52 VII.B.TPC-53
APAC (9)
Framework Mapping Values
APAC Australia CCM 2026 PRO-08
APAC Australia IoT Code of Practice 2024 7.0
APAC Australia ISM June 2026 ISM-0231 ISM-0232 ISM-0465 ISM-0467 ISM-0469 ISM-0484 ISM-0547 ISM-1139 ISM-1369 ISM-1370 ISM-1372 ISM-1373 ISM-1374 ISM-1375 ISM-1448 ISM-1453 ISM-1506 ISM-1553 ISM-1589 ISM-1781 ISM-1984 ISM-2108
APAC India RBI Digital Payments 2021 13.0 34.e 67.d 69.0
APAC India RBI PA 2025 Annex 1.1.2
APAC India SEBI CSCRF 2024 PR.DS.S1
APAC Malaysia RMiT 2025 A3-1(b) A3-1(c) A5-A2(b) A7-D2(b)(ii) A7-D2(d)(i) A7-D2(e)(iv) A10-B1(d)
APAC New Zealand NZISM 3.9 16.1.33.C.01 17.1.57.C.01
APAC Singapore CCOP CII 2026 5.7.2(d)
Americas (2)
Framework Mapping Values
Americas Argentina Reg 132 2018 A.2.1 A.2.3-DS
Americas Canada ITSP-10-171 2025 03.13.08 03.13.11

Capability Maturity Model

Level 0 — Not Performed

Practices are non-existent, based on the inability to demonstrate an implemented and operational capability. A reasonable person would conclude the control is not being performed.

Level 1 — Performed Informally

Cryptographic Protections (CRY) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include: ▪ Policies, standards & procedures associated with CRY domain capabilities provide limited coverage due to the depth and breadth of the existing documentation. ▪ Cryptography management-related activities are decentralized (e.g., a localized/regionalized function) and uses non-standardized methods to implement secure, resilient and compliant practices. ▪ IT and/or cybersecurity personnel provide an encryption solution (software or hardware) for the storage of sensitive/regulated data. ▪ Sensitive/regulated data is encrypted in transit according to standardized processes.

Level 2 — Planned & Tracked

Cryptographic Protections (CRY) capabilities are requirements-driven, but are not standardized across the entity (e.g., local/regional level consistency). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with CRY domain capabilities are formally documented and centrally-managed by the entity. ▪ Standardized Operating Procedures (SOP) associated with CRY domain capabilities are documented and maintained by process owners. ▪ IT and/or cybersecurity personnel work with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with CRY domain capabilities to address applicable statutory, regulatory and/or contractual requirements for Technology Assets, Applications, Services and/or Data (TAASD). ▪ Cryptographic management controls-related controls are primarily administrative and preventative in nature (e.g., policies, standards and procedures & guidelines). ▪ Cryptographic management may be a defined function (e.g., team or department) or assigned as an additional duty to existing IT and/or cybersecurity personnel. ▪ Technology Assets, Applications and/or Services (TAAS) that store, process or transmit sensitive/regulated data use cryptographic mechanisms to prevent unauthorized disclosure of information as an alternate to physical safeguards. ▪ External compliance requirements for cryptography are identified and documented, based on applicable laws, regulations and contractual obligations. ▪ IT and/or cybersecurity personnel work with business stakeholders and process owners to implement cryptographic mechanisms that are applicability for statutory, regulatory and/or contractual compliance obligations. ▪ Sensitive/regulated data is encrypted at rest using cryptographic protections that are commensurate with the sensitivity of the data. ▪ Sensitive/regulated data is encrypted during transmission using cryptographic protections that are commensurate with the sensitivity of the data.

Level 3 — Well Defined

Cryptographic Protections (CRY) capabilities are standardized across the entity for applicability to People, Processes, Technologies, Data and/or Facilities (PPTDF) to ensure consistency for Technology Assets, Applications, Services and/or Data (TAASD). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with CRY domain capabilities are formally documented and centrally-managed by the entity's Governance, Risk & Compliance (GRC) team, or similar function. ▪ Standardized Operating Procedures (SOP) associated with CRY domain capabilities are well-documented and kept current by process owners. ▪ A security engineering team, or similar function, is appropriately staffed and supported to implement and maintain CRY domain capabilities. ▪ Technology is leveraged to enhance the efficiency and accuracy of cryptographic protections operations (e.g., PKI management tool). ▪ The entity's Governance, Risk & Compliance (GRC) team, or similar function, works with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with CRY domain capabilities to address Minimum Compliance Requirements (MCR) (e.g., applicable statutory, regulatory and/or contractual requirements) and Discretionary Security Requirements (DSR) (e.g., entity-required controls). ▪ An implemented and operational cryptographic capability exists to protect the confidentiality of data being transmitted.

Level 4 — Quantitatively Controlled

Cryptographic Protections (CRY) capabilities, in addition to being standardized across the entity and centrally managed to ensure consistency across Technology Assets, Applications, Services and/or Data (TAASD), efforts are metrics driven to provide sufficient insight for decision makers to predict optimal performance, ensure continued operations and/or identify areas for improvement. Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Applicable SCR-CMM Level 3 (Well Defined) capabilities are implemented and operational. ▪ Metrics reporting includes quantitative analysis of Key Performance Indicators (KPIs). ▪ Metrics reporting includes quantitative analysis of Key Risk Indicators (KRIs). ▪ Scope of metrics, KPIs and KRIs covers organization-wide cybersecurity and data protection controls, including functions performed by third-parties. ▪ Organizational leadership maintains a formal process to objectively review and respond to metrics, KPIs and KRIs (e.g., monthly or quarterly review). ▪ Based on metrics analysis, process improvement recommendations are submitted for review and are handled in accordance with change control processes. ▪ Business and technical stakeholders are involved in reviewing and approving proposed changes to evolve capabilities.

Level 5 — Continuously Improving

Utilize SCR-CMM Level 3 or Level 4 (if available) criteria definitions: ▪ There are no defined Level 5 criteria, since it is reasonable to assume a continuously-improving process is not necessary to operationalize this control. ▪ Level 5 capabilities should be considered “world-class” where the control builds on Level 4 capabilities, but are continuously improving through Artificial Intelligence (AI) and/or Machine Learning (ML) technologies. ▪ While it may be possible to develop responsive capabilities for this control through the use of AI and/or ML technologies, the criteria would be organization-specific to define.

Assessment Objectives

  1. CRY-05_A01 the types of cryptography for preventing the unauthorized disclosure of data in transit are defined.
  2. CRY-05_A02 cryptographic mechanisms are implemented to prevent the unauthorized disclosure of data during transmission.
  3. CRY-05_A03 organization-defined types of cryptography are implemented to prevent the unauthorized disclosure of sensitive / regulated data in transit.
  4. CRY-05_A04 cryptographic mechanisms are implemented to prevent the unauthorized disclosure of CUI during transmission.
  5. CRY-05_A05 the types of cryptography for protecting the confidentiality of CUI are defined.
  6. CRY-05_A06 the following types of cryptography are implemented to protect the confidentiality of CUI: <A.03.13.11.ODP[01]: types of cryptography>.

Evidence Requirements

E-CRY-01 Cryptographic Protections

Documented evidence of organization-approved cryptographic solutions and modules for both data at rest and in transit.

Cryptographic Protections

Technology Recommendations

Micro/Small

  • NIST Cryptographic Module Validation Program (CMVP) (https://csrc.nist.gov)
  • Transport Layer Security (TLS)
  • IPSec encryption
  • Encrypted Multiprotocol Label Switching (MPLS)

Small

  • NIST Cryptographic Module Validation Program (CMVP) (https://csrc.nist.gov)
  • Transport Layer Security (TLS)
  • IPSec encryption
  • Encrypted Multiprotocol Label Switching (MPLS)

Medium

  • NIST Cryptographic Module Validation Program (CMVP) (https://csrc.nist.gov)
  • Transport Layer Security (TLS)
  • IPSec encryption
  • Encrypted Multiprotocol Label Switching (MPLS)

Large

  • NIST Cryptographic Module Validation Program (CMVP) (https://csrc.nist.gov)
  • Transport Layer Security (TLS)
  • IPSec encryption
  • Encrypted Multiprotocol Label Switching (MPLS)

Enterprise

  • NIST Cryptographic Module Validation Program (CMVP) (https://csrc.nist.gov)
  • Transport Layer Security (TLS)
  • IPSec encryption
  • Encrypted Multiprotocol Label Switching (MPLS)

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