Capability relationship map
Separating what we know, how we work, and what we deliver.
Four engineering disciplines combine through named relationships and cross-cutting methods to produce high-assurance software-enabled mission systems. Every part of the model is available as visible text.
Purpose
Four layers, kept distinct
Purpose, engineering disciplines, cross-cutting methods, and mission-system outcomes each answer a different question.
Why
Purpose
Deliver relevant, resilient capability at operational speed.
What ExistX knows
Four disciplines
Cryptographic, cybersecurity, software, and systems engineering.
How ExistX works
Engineering methods
Cross-cutting approaches that connect the disciplines across the lifecycle.
What ExistX delivers
Mission-system outcome
High-Assurance Software-Enabled Mission Systems: the combined outcome of the four disciplines working together.
The model
The relationship network
Four overlapping engineering disciplines — Cryptographic Engineering, Cybersecurity Engineering, Software Engineering and Modernization, and Systems Engineering and Integration — combine to produce High-Assurance Software-Enabled Mission Systems. Their intersections include applied cryptographic assurance, cryptographic modernization, embedded and crypto-agile systems, secure software modernization, cyber-resilient architecture, modular open systems integration, and higher-order combinations. ExistX applies digital and model-based engineering, MOSA, early integration, risk-based assurance, automated test and verification, interoperability engineering, and sustainment by design.
Discipline A
Cryptographic Engineering
Connects algorithm and key-management decisions to implementation, assurance, agility, embedded constraints, and lifecycle transition.
Discipline B
Cybersecurity Engineering
Integrates threat, architecture, software, components, evidence, and lifecycle decisions within a defined system boundary.
Discipline C
Software Engineering & Modernization
Mission-software and lifecycle engineering: architecture, modernization, DevSecOps, automated testing, assurance, migration, and incremental delivery.
Discipline D
Systems Engineering & Integration
Connects mission needs to architecture, embedded systems, interfaces, digital models, hardware-software integration, test, and lifecycle decisions.
Pairwise relationships
Every pair of disciplines has an explicit relationship. The model is shown as a network so no relationship disappears because of diagram geometry.
A + B
Applied Cryptographic Assurance
A + C
Cryptographic Modernization
A + D
Embedded & Crypto-Agile Systems
B + C
Secure Software Modernization
B + D
Cyber-Resilient System Architecture
C + D
Modular Open Systems Integration
Combined outcome
High-Assurance Software-Enabled Mission Systems
The combined delivery category produced when the four disciplines work as one system. It is a system outcome — not a fifth discipline, a certification, or proof of deployment.
All relationships
Every relationship, as text
The tables below provide the complete text equivalent of the named two-discipline and three-discipline relationships.
| Relationship | Disciplines combined | What the label describes |
|---|---|---|
| Applied Cryptographic Assurance | Cryptographic implementation decisions evaluated within the system's security architecture and evidence needs. | |
| Cryptographic Modernization | Updating cryptographic implementations and dependencies as part of software modernization, without breaking the mission baseline. | |
| Embedded & Crypto-Agile Systems | Cryptographic capability engineered into embedded and resource-constrained systems with planned algorithm transition paths. | |
| Secure Software Modernization | Modernizing mission software while preserving and improving its security architecture, assurance evidence, and authorization posture. | |
| Cyber-Resilient System Architecture | System boundaries, interfaces, and components engineered so the system can withstand, contain, and recover from cyber effects. | |
| Modular Open Systems Integration | Software and system boundaries engineered for replaceable components, defined interfaces, and conformance evidence. |
| Relationship | Disciplines combined | What the label describes |
|---|---|---|
| Assured Cryptographic Software | Cryptographic software engineered, modernized, and assured against defined properties within a security architecture. | |
| High-Assurance Cryptographic Platforms | Platforms whose cryptographic and security architecture is engineered and assured as part of the integrated system. | |
| Crypto-Agile Mission Systems | Mission systems whose software and system architecture support cryptographic replacement and transition over the lifecycle. | |
| Secure Modular Mission Software | Modular mission software engineered with explicit security boundaries, interfaces, and assurance evidence. |
Where published evidence exists for a combination of disciplines, it appears as a record in Work and Evidence.
How ExistX works
The method layer
Methods connect the disciplines to the mission system across architecture, implementation, integration, test, assurance, and sustainment.
- Digital and Model-Based Engineering
Models, mission engineering, MBSE, simulation, and virtual integration expose problems before physical integration and connect decisions to evidence.
- Modular Open Systems Approach
Stable boundaries, replaceable components, defined interfaces, standards, conformance evidence, and appropriate technical-data and IP planning.
Early Integration and Experimentation
Components and technologies integrated before full-system test through prototypes, hardware- and software-in-the-loop environments, incremental demonstrations, and explicit readiness decisions.
- Risk-Based Technical Assurance
Formal verification, program analysis, automated verification and validation, test, independent review, and certification support selected proportionately to the property, mission consequence, boundary, and residual uncertainty.
Automated Test and Verification
Repeatable evidence generation automated while distinguishing test, analysis, proof, validation, and operational evaluation.
Interoperability Engineering
Contracts, data models, interfaces, standards, and conformance boundaries defined across components and systems.
Sustainment by Design
Upgradeability, obsolescence, technical-data access, source-code and software rights, maintenance flexibility, configuration, provenance, and product support addressed early.
What ExistX delivers
The delivery layer
System deliverables, engineering artifacts, and assurance and sustainment outputs support the combined mission-system outcome.
System deliverables
- Modernized mission software
- Secure embedded systems
- Crypto-agile platforms
- Modular mission-system architectures
- Integrated hardware-software prototypes
- Interoperable system components
- Software-defined mission capabilities
- Upgradeable legacy platforms
- Cyber-resilient system baselines
Engineering deliverables
- System and software architectures
- Digital models and digital threads
- Open interface specifications
- Software APIs and component contracts
- Integration environments
- Modeling and simulation environments
- Automated test infrastructure
- Hardware-in-the-loop environments
- Technology and integration maturity evidence
Assurance and sustainment deliverables
- Verification and validation evidence
- Cybersecurity evidence packages
- Certification-ready baselines, only when bounded and approved
- Technical-data packages
- Configuration and provenance records
- Lifecycle sustainment strategies
- Modernization roadmaps
- Obsolescence and vendor-lock mitigation plans
Intended outcomes
Engineering outcomes
These outcomes guide the engineering. Measured results for specific work are stated separately in Work and Evidence.
- Faster fielding and modernization
- Earlier and lower-risk integration
- Modular technology insertion
- Increased vendor competition
- Reduced test and rework
- Greater cyber resilience
- Government-controlled upgrade paths
- Improved maintainability and sustainment
- Mission-level interoperability
How to read the map
Orientation first, evidence second
The map shows how disciplines, methods, relationships, and deliverables fit together. Evidence for specific work lives in Work and Evidence.
- Cryptographic EngineeringConnects algorithm and key-management decisions to implementation, assurance, agility, embedded constraints, and lifecycle transition.
- Cybersecurity EngineeringIntegrates threat, architecture, software, components, evidence, and lifecycle decisions within a defined system boundary.
- Software Engineering & ModernizationMission-software and lifecycle engineering: architecture, modernization, DevSecOps, automated testing, assurance, migration, and incremental delivery.
- Systems Engineering & IntegrationConnects mission needs to architecture, embedded systems, interfaces, digital models, hardware-software integration, test, and lifecycle decisions.
- How We WorkThe research pipeline and engineering methods that connect the disciplines.
- High-Assurance Software-Enabled Mission SystemsThe combined mission-system outcome at the center of the model.
- Work and evidenceRecords stated with attribution, environment, result, and limitations.
Next step
Explore a discipline
Use the map for orientation, then follow the discipline or method closest to your technical need.
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