Data Flows

Product and cybersecurity architecture understanding package generated from Markdown-derived requirements.

Last updated: 2026-06-29 11:49
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Data Flows

Product and cybersecurity architecture understanding package generated from Markdown-derived requirements.

High-Level Data Flow Diagram

flowchart LR Req["Customer requirements"] -->|traceability evidence| ALM["ALM / evidence repository"] ALM -->|security concept and VnV reports| OEM["OEM customer"] Diag["Diagnostic tool"] -->|UDS requests, credentials| ECU["Electric Clutch Actuator ECU"] ECU -->|diagnostic responses, logs| Diag Net["Vehicle network"] <--> |signals, SDT / SecOC data, counters| ECU Backend["Backend / update service"] -->|software package, signature, IVD| ECU PKI["PKI"] -->|certificates and trust anchors| ECU ECU -->|security events, vulnerabilities| SecOps["Security operations"] SecOps -->|incident and mitigation feedback| ALM
Mermaid source 
flowchart LR
  Req["Customer requirements"] -->|traceability evidence| ALM["ALM / evidence repository"]
  ALM -->|security concept and VnV reports| OEM["OEM customer"]
  Diag["Diagnostic tool"] -->|UDS requests, credentials| ECU["Electric Clutch Actuator ECU"]
  ECU -->|diagnostic responses, logs| Diag
  Net["Vehicle network"] <--> |signals, SDT / SecOC data, counters| ECU
  Backend["Backend / update service"] -->|software package, signature, IVD| ECU
  PKI["PKI"] -->|certificates and trust anchors| ECU
  ECU -->|security events, vulnerabilities| SecOps["Security operations"]
  SecOps -->|incident and mitigation feedback| ALM

Architecture Data Flow View

Data Flow View

Classification: Inferred from Requirements

The data-flow view tracks requirements/evidence, diagnostic traffic, vehicle data, software/update packages, key/certificate data, security events, and vulnerability/incident records.

Evidence Basis:

  • Related requirements: RFQX-1001379436-P10-000-01-0001; RFQX-1001379436-P10-000-01-0002; RFQX-1001379436-P10-000-01-0003; RFQX-1001379436-P10-000-01-0004; RFQX-1001379436-P10-000-01-0005; RFQX-1001379436-P10-000-01-0006; RFQX-1001379436-P10-000-01-0007; RFQX-1001379436-P10-000-01-0008; RFQX-1001379436-P10-000-01-0009; RFQX-1001379436-P10-000-01-0010 (sample: 10 of 641)
  • Source document: source document page 3; source document page 5; source document page 6; source document page 7; source document page 8; source document page 9; source document page 10; source document page 11(sample: 8 of 163)
  • Confidence level: Low
  • Classification: Inferred from Requirements

Interface Data Flows

FlowDirectionDataProtectionClassificationEvidence
OEM/customer cybersecurity approval and evidence interfaceSupplier security engineering -> vehicle manufacturer/OEM/customerRequirements, risk assessment method/results, cybersecurity concept, control traceability, V&V evidence, residual-risk records.Access control, evidence integrity, versioning, audit trail, customer approval workflow, confidentiality for security-sensitive reports.Explicit RequirementRFQX-1001379436-P10-000-01-0001; RFQX-1001379436-P10-000-01-0002; RFQX-1001379436-P10-000-01-0003; RFQX-1001379436-P10-000-01-0005; RFQX-1001379436-P10-000-01-0007; RFQX-1001379436-P10-000-01-0008; RFQX-1001379436-P10-000-01-0009; RFQX-1001379436-P10-000-01-0010 (sample: 8 of 187)
Diagnostic/service tool to ECU interfaceDiagnostic/service tool -> ECU diagnostic server/security servicesUDS requests/responses, authentication data, certificates, session state, diagnostic security decisions, negative responses.Authentication, authorization, secure session, certificate validation, rate limiting, replay protection, logging.Explicit RequirementRFQX-1001379436-P10-000-01-0029; RFQX-1001379436-P10-000-01-0030; RFQX-3299216-1-0107; RFQX-3299216-1-0126; RFQX-3299216-1-0127; RFQX-CVS123-2-0005; RFQX-CVS123-2-0006; RFQX-CVS123-2-0007 (sample: 8 of 640)
Vehicle network secure data communication interfaceOther ECUs / vehicle network <-> product ECU/applicationSignals, messages, SDT requests/responses, SecOC-protected data, freshness counters, authentication tags.Message authentication, integrity, freshness, anti-replay, optional encryption, discard rules for malformed or unauthenticated data.Inferred from RequirementsRFQX-3299216-1-0006; RFQX-3299216-1-0079; RFQX-3299216-1-0088; RFQX-3299216-1-0094; RFQX-3299216-1-0095; RFQX-3299216-1-0100; RFQX-3299216-1-0135; RFQX-3299216-1-0164 (sample: 8 of 251)
Secure update, flash, and IVD interfaceUpdate/flash backend or programming tool -> ECU update/boot/security servicesSoftware packages, signatures, IVD data, certificates, programming requests, update result logs.Package authenticity, integrity validation, secure boot linkage, certificate validation, rollback policy, logging.Inferred from RequirementsRFQX-3299216-1-0176; RFQX-CVS123-2-0001; RFQX-CVS123-2-0004; RFQX-CVS123-2-0006; RFQX-CVS123-2-0007; RFQX-CVS123-2-0008; RFQX-CVS123-2-0013; RFQX-CVS123-2-0023 (sample: 8 of 131)
Certificate and key provisioning interfacePKI/provisioning authority -> ECU security services / HSMKeys, certificates, trust anchors, certificate chains, key identifiers, validity metadata.Key protection, certificate validation, secure provisioning, authorization, audit, lifecycle controls.Explicit RequirementRFQX-1001379436-P10-000-01-0041; RFQX-1001379436-P10-000-01-0042; RFQX-CVS123-2-0090; RFQX-CVS123-2-0112; RFQX-CVS123-2-0113; RFQX-CVS123-2-0295; RFQX-CVS123-2-0296; RFQX-CVS124-0072 (sample: 8 of 125)
Backend/cloud/IT operational interfaceBackend/cloud/IT systems <-> supplier/OEM/product lifecycle processesConfiguration, release data, software packages, logs, evidence, vulnerability records, security events.Mutual authentication, transport encryption, authorization, audit logging, least privilege, vulnerability management.Inferred from RequirementsRFQX-1001379436-P10-000-01-0001; RFQX-1001379436-P10-000-01-0002; RFQX-1001379436-P10-000-01-0003; RFQX-1001379436-P10-000-01-0004; RFQX-1001379436-P10-000-01-0005; RFQX-1001379436-P10-000-01-0006; RFQX-1001379436-P10-000-01-0007; RFQX-1001379436-P10-000-01-0008 (sample: 8 of 1033)
Development, ALM, and evidence tooling interfaceEngineering tools / ALM / CI / test systems -> evidence and release artifactsRequirements, source references, architecture decisions, test reports, traceability matrices, release evidence.Role-based access, artifact integrity, audit trail, change control, branch/release governance, credential protection.Explicit RequirementRFQX-1001379436-P10-000-01-0001; RFQX-1001379436-P10-000-01-0002; RFQX-1001379436-P10-000-01-0003; RFQX-1001379436-P10-000-01-0005; RFQX-1001379436-P10-000-01-0006; RFQX-1001379436-P10-000-01-0008; RFQX-1001379436-P10-000-01-0014; RFQX-1001379436-P10-000-01-0015 (sample: 8 of 310)
Security operations and vulnerability reporting interfaceProduct/backend/security monitoring -> supplier and OEM security operationsSecurity events, logs, vulnerabilities, incident records, penetration-test findings, mitigations, risk treatment decisions.Confidentiality, integrity, authenticated reporting, audit, incident workflow, retention controls.Explicit RequirementRFQX-1001379436-P10-000-01-0008; RFQX-1001379436-P10-000-01-0014; RFQX-1001379436-P10-000-01-0020; RFQX-1001379436-P10-000-01-0023; RFQX-1001379436-P10-000-01-0047; RFQX-1001379436-P10-000-01-0048; RFQX-1001379436-P10-000-01-0049; RFQX-1001379436-P10-000-01-0050 (sample: 8 of 32)
Application software to security services interfaceApplication software -> security services / crypto / diagnostic access controlRequests, messages, state variables, verification results, authorization decisions, security events.API authorization, fail-closed error handling, input validation, logging, secure key isolation.Inferred from RequirementsRFQX-1001379436-P10-000-01-0006; RFQX-1001379436-P10-000-01-0009; RFQX-1001379436-P10-000-01-0010; RFQX-1001379436-P10-000-01-0011; RFQX-1001379436-P10-000-01-0012; RFQX-1001379436-P10-000-01-0016; RFQX-1001379436-P10-000-01-0021; RFQX-1001379436-P10-000-01-0025 (sample: 8 of 1083)
Hardware platform and key storage interfaceSecurity services -> hardware platform / protected storage / HSM where availableKeys, certificates, boot measurements, software authenticity status, platform security state.Key isolation, access control, secure boot, debug restrictions, tamper-aware handling, audit.Inferred from RequirementsRFQX-1001379436-P10-000-01-0002; RFQX-1001379436-P10-000-01-0004; RFQX-1001379436-P10-000-01-0012; RFQX-1001379436-P10-000-01-0020; RFQX-1001379436-P10-000-01-0022; RFQX-1001379436-P10-000-01-0027; RFQX-1001379436-P10-000-01-0029; RFQX-1001379436-P10-000-01-0030 (sample: 8 of 214)