Sr 9 1 Multiple Stages Of System

---
name: "SR-9(1)_multiple-stages-of-system-development-life-cycle"
description: "Employ anti-tamper technologies, tools, and techniques throughout the system development life cycle."
category: "configuration"
version: "5.2.0"
author: "cyberstrike-official"
tags:
  - nist
  - sp800-53
  - rev5
  - sr-9-1
  - sr
  - enhancement
tech_stack:
  - any
cwe_ids: []
chains_with:
  - SA-3
prerequisites:
  - SR-9
severity_boost:
  SA-3: "Chain with SA-3 for comprehensive security coverage"
---

# SR-9(1) Multiple Stages of System Development Life Cycle

> **Enhancement of:** SR-9

## High-Level Description

**Family:** Supply Chain Risk Management (SR)
**Framework:** NIST SP 800-53 Rev 5

The system development life cycle includes research and development, design, manufacturing, acquisition, delivery, integration, operations and maintenance, and disposal. Organizations use a combination of hardware and software techniques for tamper resistance and detection. Organizations use obfuscation and self-checking to make reverse engineering and modifications more difficult, time-consuming, and expensive for adversaries. The customization of systems and system components can make substitutions easier to detect and therefore limit damage.

## What to Check

- [ ] Verify SR-9(1) Multiple Stages of System Development Life Cycle is documented in SSP
- [ ] Confirm control is operating effectively
- [ ] Review evidence of continuous monitoring for SR-9(1)
- [ ] Verify enhancement builds upon base control SR-9

## How to Test

### Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for SR-9(1) implementation details. Verify the organization has documented how this control is satisfied.

### Step 2: Validate Implementation

```
# For cloud environments, use cloud-audit-mcp tools
# For on-premises, review system configurations directly

# Example: Check if account management policies exist
grep -r "account.management\|access.control" /etc/security/ 2>/dev/null
```

### Step 3: Test Operating Effectiveness

Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.

## Tools

| Tool          | Purpose                           | Usage |
| ------------- | --------------------------------- | ----- |
| Manual Review | Documentation and interview-based | N/A   |

## Remediation Guide

### Control Statement

Employ anti-tamper technologies, tools, and techniques throughout the system development life cycle.

### Implementation Guidance

The system development life cycle includes research and development, design, manufacturing, acquisition, delivery, integration, operations and maintenance, and disposal. Organizations use a combination of hardware and software techniques for tamper resistance and detection. Organizations use obfuscation and self-checking to make reverse engineering and modifications more difficult, time-consuming, and expensive for adversaries. The customization of systems and system components can make substitutions easier to detect and therefore limit damage.

## Risk Assessment

| Finding                                                                  | Severity | Impact                                  |
| ------------------------------------------------------------------------ | -------- | --------------------------------------- |
| SR-9(1) Multiple Stages of System Development Life Cycle not implemented | Medium   | Supply Chain Risk Management            |
| SR-9(1) partially implemented                                            | Low      | Incomplete Supply Chain Risk Management |

## CWE Categories

| CWE ID | Title                 |
| ------ | --------------------- |
| N/A    | No direct CWE mapping |

## References

- [NIST SP 800-53 Rev 5 - SR-9(1)](https://csrc.nist.gov/projects/cprt/catalog#/cprt/framework/version/SP_800_53_5_1_1/home?element=sr-9.1)
- [NIST SP 800-53A Rev 5 (Assessment Procedures)](https://csrc.nist.gov/pubs/sp/800/53/a/r5/final)
- [NIST SP 800-53 Rev 5 Full Catalog](https://csrc.nist.gov/pubs/sp/800/53/r5/upd1/final)

## Checklist

- [ ] Control documented in SSP
- [ ] Implementation evidence collected
- [ ] Operating effectiveness validated
- [ ] Continuous monitoring in place
- [ ] Related controls (SA-3) reviewed