MDLCE™ (Murray Deterministic Liability Closure Engine) is a compliance attestation engine for safety-critical and regulated software systems. It generates cryptographically-sealed compliance artifacts that provide durable evidence of how software executed and how safety standards were applied at a specific point in time, reducing the risk of reinterpretation under evolving regulatory frameworks.

The problem

Safety-critical software certification can cost several million pounds and take many months per cycle. Post-deployment, software behavior can be reinterpreted years later under new regulatory interpretations, creating unbounded liability exposure. MDLCE addresses this by generating non-reinterpretable compliance evidence designed to resist dispute under future regulatory changes.

Prohibitive recertification costs

Every software update requires manual recertification at significant cost and time, limiting agile development in safety-critical systems.

Multi-million pound cycles, extended timelines

Reinterpretable compliance evidence

Traditional documentation and test logs can be reinterpreted under evolving regulatory standards, creating extended liability disputes.

Multi-billion pound exposure in prolonged disputes

Blocked innovation

Over-the-air updates and rapid iteration are impractical when each change requires 18-month recertification cycles.

Competitors iterate weekly vs. 18-month cycles

The solution

MDLCE generates cryptographically-sealed attestation artifacts that prove exactly what software executed and how it complied with safety standards—creating non-reinterpretable evidence designed to resist dispute under future regulatory changes.

Core design principle

Given an execution trace and safety schema, MDLCE is designed to generate cryptographically-sealed attestation artifacts where reinterpretation under a materially different schema invalidates the cryptographic seal.

This is achieved through schema hash binding (Patent Claim 11), deterministic execution capture, and cryptographic chaining of evidence.

Five-lock attestation pipeline

Deterministic execution capture

DMU-ME and DTE-E components capture execution state and evidence with bit-perfect reproducibility.

Safety compilation

DSC-E compiles safety properties into verifiable constraints with deterministic SAT-based proof generation.

Schema binding (Patent Claim 11)

DIT-A binds safety interpretation schema to attestation via cryptographic hash, preventing retroactive reinterpretation.

Temporal anchoring

DTA creates RFC 3161 timestamp proof, establishing exact time of compliance assessment under specific standards.

Attestation sealing

Final cryptographic seal combines all components into tamper-evident, non-reinterpretable compliance certificate.

Patent Claim 11: Non-reinterpretable attestation

The core innovation is cryptographic schema binding: the safety interpretation schema is hashed and sealed with the compliance verdict. Any attempt to claim "the standards meant something different" invalidates the cryptographic seal. This shifts compliance evidence from narrative interpretation toward cryptographically verifiable attestation.

Validation

MDLCE has been validated as a proof-of-concept attestation engine through 579 days of continuous operation and 50 million tick processing.

579 Days continuous validation

50M Ticks processed

113 Tests passing (100%)

42ms Verification speed (10K ticks)

Validation includes deterministic execution capture, safety property compilation, schema binding verification, temporal anchoring, and complete attestation pipeline testing. The platform has been designed to align with DO-178C, IEC 62304, ISO 26262, and IEC 61508 safety standards.

Production validation results

Duration: 579 days continuous operation on production workloads

Scale: 50 million ticks processed with consistent attestation generation

Verification: 42ms to verify 10,000-tick attestation artifact

Reliability: No attestation generation failures observed, 113/113 tests passing

Acquisition relevance

MDLCE is designed to be acquired, licensed, or embedded as certification infrastructure by organizations deploying safety-critical software at scale.

Aerospace

DO-178C certification

Liability closure and accelerated recertification have become strategic priorities. Software changes can require extended manual recertification periods.

Medical Devices

IEC 62304 Class C

Firmware updates can require significant investment and extended timelines, limiting rapid deployment of safety improvements.

Automotive

ISO 26262 ASIL D

Traditional manufacturers face extended recertification cycles while software-first competitors iterate more rapidly with over-the-air updates.

Industrial Control

IEC 61508 SIL 4

Safety-critical industrial systems require frequent updates for security patches, which can be constrained by recertification costs.

Development Status: MDLCE is a validated proof-of-concept attestation engine with 579 days production validation, 50M tick processing, and 113/113 tests passing. Integration with specific safety certification workflows would be completed by the acquiring organization.

Strategic certification IP

Detailed technical documentation, 579-day validation results, Patent Claim 11 analysis, and integration guidance available under NDA.

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