[rahadbhuiya]

Overview

This Draft PR introduces the initial specification for a Platform-Independent Security Qualification Contract (v0.1) for NASA cFS flight software running on Linux platforms.

This document was developed in response to the architectural discussion at nasa/cFS #1168, where the need to separate platform-independent security contracts from platform-specific enforcement adapters was identified.

Document Location

docs/SECURITY_CONTRACT_v01.md

Six Security Invariants

ID	Invariant	Status
SEC-INV-01	Authorization Before Dispatch	DRAFT / NOT_QUALIFIED
SEC-INV-02	Executor Identity and Instance Binding	DRAFT / NOT_QUALIFIED
SEC-INV-03	Replay and Bypass Resistance	DRAFT / NOT_QUALIFIED
SEC-INV-04	Independently Verified Effect Completion	DRAFT / NOT_QUALIFIED
SEC-INV-05	Observation-Loss Accounting	DRAFT / NOT_QUALIFIED
SEC-INV-06	Fail-Closed Qualification	DRAFT / NOT_QUALIFIED

Reference Implementation

The Linux/eBPF testbed in this repository (cfs-adversarial-testbed, commit 6c6e0e4) serves as the initial reference implementation. All six invariants pass under live kernel enforcement with zero userland fallbacks.

CI evidence: https://github.com/Exploidus/cfs-adversarial-testbed/actions/runs/41050876794

Scope and Constraints

• This PR is strictly documentary. It does not modify the portable cFS core.
• It does not imply certification or endorsement by NASA.
• Every invariant carries DRAFT / NOT_QUALIFIED status until independently evaluated.
• Equivalent guarantees on other platforms (RTEMS, VxWorks) are explicitly NOT_QUALIFIED.

Requested Review

@bonushora - Please review each invariant section by section and contribute refinements and adversarial acceptance criteria as discussed in nasa/cFS #1168.