# SEC - SECURITY CANON
version: v1.3
status: ACTIVE
parent: master_architecture_index.md
phase: 08
phase_name: Security Canon
document_role: security_governance_authority

## 1. OBJECTIVE
Define security rules, boundaries and enforcement across Devon.

This file owns:
- security governance
- trust model
- access boundary rules
- memory protection expectations
- runtime protection expectations
- server baseline security expectations
- security monitoring expectations

Structured security implementation lives in:
- host_security_canonical.json
- app_security_canonical.json
- module_security_canonical.json
- runtime_security_canonical.json
- delivery_security_canonical.json
- approval_canonization_policy.json
- memory_isolation_canonical.json
- security_monitoring_canonical.json

## 2. CORE PRINCIPLE
Security is not optional.
Every operation must be bounded, validated and auditable.

## 3. TRUST MODEL

### 3.1 Zero Trust
- no implicit trust
- every request must be verified
- every module must validate input

### 3.2 Identity Enforcement
- every actor must have identity
- no anonymous execution allowed

## 4. ACCESS CONTROL
Protected operations require:
- authentication
- authorization
- audit trace

Role-based or policy-based access is allowed.
Unbounded access is forbidden.

## 5. MEMORY SECURITY BOUNDARY
Memory must be treated as protected system state.

Rules:
- no anonymous memory access
- no unrestricted memory mutation
- memory writes must be attributable
- retrieval access must respect scope and policy
- audit linkage is required for protected memory operations
- cross-boundary access is forbidden by default
- deny by default when scope is required and missing
- memory exposure policy must exist for each environment
- data exposure policy must exist for each environment

## 6. MEMORY PARTITIONING LAW
Protected memory must be partitioned by observable namespace.

Namespace partitioning is flexible.
It is not defined by a mandatory fixed order.

Allowed namespace dimensions may include:
- org
- tenant
- client
- project
- workspace
- agent
- user
- session
- memory class

Rule:
retrieval, write, update and delete operations must validate compatible scope against the target memory class.

Global institutional memory is allowed only when explicitly tagged and policy-approved.

## 7. SERVER SECURITY BASELINE
Initial server security is part of canon.

Minimum monitored baseline must cover:
- SSH policy
- firewall policy
- sudo policy
- secrets handling
- patch/update policy
- process exposure
- service exposure
- network exposure
- persistent storage exposure
- backup policy for protected state

A server is not security-ready if these controls are undefined or unmonitored.

## 8. SECURITY MONITORING LAW
Security must be continuously monitored.

Minimum monitored security domains:
- host baseline
- application baseline
- runtime baseline
- auth/access anomalies
- memory scope violations
- retrieval scope violations
- privileged action traces
- promotion gate security
- backup integrity evidence

## 9. UI OPERATIONAL SECURITY VISIBILITY
Security monitoring must be exposable to the operational UI through canonical data.

The operational UI should be able to show:
- baseline coverage status
- control-by-control PASS / FAIL / MISSING
- scope violation events
- latest audit evidence
- protected environment readiness
- environment-specific memory/data exposure status
- separation status between operator code, runtime artifacts and debug artifacts

## 10. RUNTIME SECURITY BOUNDARY
Runtime must enforce:
- bounded execution
- secrets isolation
- environment separation
- sandbox-first promotion path
- separation between operator code, runtime artifacts and debug artifacts
- no unrestricted exposure of runtime-sensitive artifacts across environments

## 11. SECURITY PRECEDENCE RULE
If security conflicts with flow, latency or convenience:
security wins.