# SC-04 Information in Shared System Resources

NIST SP 800-53 control. Family: SC System and Communications Protection. Function: preventative. Baselines: moderate, high. Mapping licence: CC BY-SA 4.0.

Statement: Prevent unauthorized and unintended information transfer via shared system resources.
Guidance: Preventing unauthorized and unintended information transfer via shared system resources stops information produced by the actions of prior users or roles (or the actions of processes acting on behalf of prior users or roles) from being available to current users or roles (or current processes acting on behalf of current users or roles) that obtain access to shared system resources after those resources have been released back to the system. Information in shared system resources also applies to encrypted representations of information. In other contexts, control of information in shared system resources is referred to as object reuse and residual information protection. Information in shared system resources does not address information remanence, which refers to the residual representation of data that has been nominally deleted; covert channels (including storage and timing channels), where shared system resources are manipulated to violate information flow restrictions; or components within systems for which there are only single users or roles.

## Enhancements (1)
- SC-04(02) Multilevel or Periods Processing
Withdrawn by NIST: SC-04(01) (now in SC-04).
Each enhancement's statement: /api/v1/controls/SC-04?fields=enhancements

## Patterns that use it (7)
- Critical (1): SP-027 Secure LLM Usage
- Important (3): SP-011 Cloud Computing Pattern; SP-047 Secure Agentic AI Frameworks; SP-050 Mobile Security Architecture (draft)
- Standard (3): SP-001 Client Module; SP-002 Server Module; SP-013 Data Security Pattern

## Clauses by framework (25 frameworks)
- nist_csf_2: PR.DS-01, PR.DS-02, PR.DS-10, PR.IR-01
- anssi: Hygiene.19, SecNumCloud.9.3
- osfi_b13: B-13.3.2
- finma_circular: IV.D(78), IV.E(83)
- gdpr: Art.5(1)(f), Art.32(1)(a)
- dora: Art.9(4)(b)
- rbi_csf: Annex1.4
- fisc: FISC.T5
- mlps_2: 8.1.4.10, 8.2
- qatar_nia: AM, CS
- uae_ia: T7
- bog_cisd: CISD-VI
- bcbs_239: Principle 2
- bot_cyber: Ch2.4
- cpmi_pfmi: CG.PR
- ecb_croe: CROE.2.3.5
- ffiec_is: II.C.18
- hipaa_sr: §164.308(a)(4)(i)
- iosco_cyber: PROT-3
- cmmc_2: SC
- common_criteria: CC Part 2 — FDP, CC Part 2 — FPT
- fda_cyber: SA-4
- owasp_masvs_v2: MASVS-PLATFORM-3, MASVS-STORAGE-2
- basel_sco60: SCO60.64
- sec_custody_digital: SEC-CD-04
OSA's mapping for nist_csf_2 takes NIST's published crosswalk as its base. A clause not marked as OSA's own is in that crosswalk.

## More
- This control as JSON, with guidance and ATT&CK techniques: /api/v1/controls/SC-04
- Clauses only: /api/v1/controls/SC-04?fields=mappings
- Page for people: /controls/sc-04/