xdv-audit

XDV Deterministic Audit & Attestation - Cross-Domain Trace Logging and Verifiable Execution Integrity.

Specification: XDV-034
Status: Normative (Draft)
Depends On: XDV-001 through XDV-033

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Purpose

xdv-audit implements the Deterministic Audit & Attestation (DAA) framework of XDV, providing:

• Cross-domain trace logging (K/Q/Φ domains)
• Verifiable execution logs (tamper-evident)
• Hardware attestation interface
• Replay-verified execution

DAA ensures that hybrid execution across K/Q/Φ is auditable, verifiable, tamper-evident, and replay-compatible.

Deterministic orchestration SHALL be observable and provable.

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Architectural Principles

Audit and attestation in XDV SHALL satisfy:

1. Deterministic trace ordering - total order with logical timestamps
2. Tamper-evident logging - cryptographic hash chaining
3. Cryptographically verifiable records - digital signatures
4. Cross-domain coverage - K, Q, and Φ domain events
5. Hardware authenticity verification - attested hardware required

Audit SHALL NOT alter execution ordering.

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Project Structure

xdv-audit/
├── LICENSE                    # Dust Open Source License (DOSL)
├── State.toml                # Workspace manifest
├── README.md                 # This file
├── src/
│   ├── audit_bridge.ds       # Main entry point
│   ├── trace/
│   │   ├── global_trace.ds    # Global execution trace T
│   │   ├── trace_entry.ds     # Trace entry structure
│   │   ├── ordering.ds        # Deterministic ordering
│   │   └── tamper_evident_log.ds  # Append-only log with hash chain
│   ├── attestation/
│   │   ├── hw_attestation.ds  # Hardware provider attestation
│   │   ├── attestation_record.ds  # Attestation structure
│   │   └── provider_binding.ds    # Domain binding verification
│   ├── replay/
│   │   ├── replay_verified.ds # Replay-verified execution
│   │   ├── scheduler_replay.ds    # Scheduler decision reconstruction
│   │   └── authorization_replay.ds # Authorization decision reproduction
│   ├── verification/
│   │   ├── hash_chain_verify.ds   # Hash chain integrity
│   │   ├── signature_verify.ds    # Signature validity
│   │   └── ordering_verify.ds     # Deterministic ordering check
│   └── export/
│       └── remote_verify.ds   # Remote verification interface
└── docs/
    └── audit_architecture.md

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Cross-Domain Trace Logging

Global Trace Definition

The global execution trace T is defined as:

T = Ordered( E_total )

Where E_total includes:

• Process lifecycle events
• Domain bindings
• Resource contracts
• Domain transitions
• Measurements (Q)
• Φ transform invocations
• Fault events
• Capability issuance/revocation
• Scheduler arbitration decisions

Trace Entry Structure

Each trace entry includes:

Entry = (
    Event_ID,
    Logical_Timestamp,
    Domain,
    Process_ID,
    Capability_ID,
    Resource_Contract_ID,
    Event_Type,
    Event_Metadata,
    Outcome_Status,
    Cryptographic_Hash
)

Hash chains to previous entry to ensure integrity.

Deterministic Ordering

Trace entries SHALL:

• Be totally ordered
• Include logical timestamp L
• Reflect deterministic arbitration
• Be identical under replay (except physical outcomes)

Trace SHALL NOT depend on wall-clock time for ordering.

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Domain-Specific Logging

K-Domain (Classical)

K-domain SHALL log:

• Process scheduling
• Memory mapping
• IPC events

Q-Domain (Quantum)

Q-domain SHALL log:

• Container allocation
• Measurement invocation
• Decoherence events
• Hardware error reports

Φ-Domain (Phase-Native)

Φ-domain SHALL log:

• Envelope allocation
• Coherence window activation
• Transform invocation
• Integrity violations

All integrate into global trace.

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Tamper-Evident Logging

Trace logs SHALL:

• Be append-only
• Use cryptographic hash chaining
• Support digital signatures
• Detect any modification

Modification SHALL invalidate verification.

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Log Verification Model

Verification SHALL confirm:

1. Hash chain integrity
2. Signature validity
3. Deterministic ordering compliance
4. Capability authorization consistency
5. Resource contract consistency

Verification MAY be performed:

• Locally
• By a remote verifier
• By compliance systems

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Hardware Attestation

Attestation Requirements

Hardware providers SHALL present:

• Cryptographic identity
• Signed firmware measurement (PQ signature)
• Capability declaration
• Resource limits
• Supported transform set (Φ)
• Supported qubit topology (Q)

Attestation SHALL be verified before domain binding.

Attestation Structure

Attestation_Record = (
    Provider_ID,
    Hardware_Model,
    Firmware_Hash,
    Capability_Declaration,
    Timestamp,
    PQ_Signature
)

Signature SHALL use post-quantum cryptography.

Attestation Logging

Attestation events SHALL:

• Be logged deterministically
• Be included in global trace
• Be verifiable during replay
• Bind provider identity to execution session

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Replay-Verified Execution

Replay SHALL:

• Reconstruct scheduler decisions
• Reconstruct domain transition ordering
• Reproduce authorization decisions
• Validate contract issuance

Replay SHALL NOT attempt to reconstruct:

• Raw Q amplitude states
• Raw Φ phase structure

Replay verifies orchestration — not physical state.

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Cross-Domain Integrity Guarantees

Audit framework SHALL guarantee:

• No domain operation occurs without log entry
• No capability use occurs without trace record
• No resource contract exists without logged issuance
• No transition occurs without deterministic entry

Missing log entry constitutes integrity failure.

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Remote Verification

XDV SHALL support remote verification where:

• Trace logs are exported securely
• Verifier confirms hash chain
• Verifier validates signatures
• Verifier checks ordering invariants

Remote verifier SHALL be able to prove: execution followed deterministic orchestration rules.

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Privacy Considerations

Audit logs SHALL:

• Avoid exposing raw Q state
• Avoid exposing raw Φ phase data
• Respect process confidentiality policies
• Protect sensitive cryptographic materials

Only structured metadata SHALL be logged.

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Build

cd xdv-audit/src
dust build

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Compliance

An implementation is compliant if:

1. All cross-domain events are logged
2. Logs are cryptographically chained
3. Hardware attestation is mandatory
4. Verification can detect tampering
5. Replay reproduces orchestration decisions
6. Audit does not violate domain invariants

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Related Specifications

• XDV-001 through XDV-033 (prerequisites)
• XDV-031 (Cryptographic Architecture - used by xdv-audit)
• XDV-040 (Cross-Domain Network Stack)
• XDV-070 (Cross-Domain Telemetry Model)
• XDV-071 (Deterministic Replay Engine)