Authorize archive retrieval before issuing object capabilities
An audit search hit contains a raw object key; clients can request other tenants' segments by changing that key.
- Focused work estimate
- 5h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Authorization architecture · Data isolation
Estimated field mix
- Security50%
- System design30%
- Storage systems20%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
A fictional procurement platform keeps append-only action records. Operators want fast recent search and affordable old records without losing provenance or leaking tenant data.
Setup prerequisites
- Create synthetic audit events and local storage/search adapters.
- Use an explicit fictional retention policy, not legal advice.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
- AARCHIVE-101 · Define which audit questions require indexed search versus archive retrieval
- AARCHIVE-102 · Calculate archive storage growth from event size and retention assumptions
- AARCHIVE-103 · Choose hot and cold archive boundaries with a reviewable decision record
- AARCHIVE-104 · Define an immutable archive segment manifest
- AARCHIVE-105 · Specify search indexing as a rebuildable projection of archived events
Acceptance criteria
- Resolve event and segment within the caller's authorized tenant.
- Issue a capability scoped to the exact object version.
- Avoid exposing neighboring events through shared-segment retrieval.
Implementation constraints
- Choose per-tenant segments or a server-side filtered retrieval contract.
Verification to include
- Retrieve a permitted synthetic event through the chosen boundary.
- Alter tenant or segment identity and verify no capability is issued.
Deliverables
- Archive access contract and cross-tenant probe
Rollout and recovery
Keep raw objects private; enable retrieval only after the projection isolation checks pass.
Value of the work
For the engineer: Practice storage tradeoffs, provenance and data-lifecycle decisions.
For the team: Review archive cost and retrieval guarantees before committing to infrastructure.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.