retrieval cache partitioning by policy class reduces leakage

Teams are partitioning retrieval caches by policy class and entitlement scope to prevent unsafe reuse across roles and tenant boundaries (Redis security).

see also: retrieval entitlement middleware enforces row level guardrails · policy aware caching cuts hallucination regressions

implementation detail

Cache keys now include policy domain and role markers in addition to query fingerprints.

security signal

• Cross-scope leakage incidents decline.
• Cache invalidation becomes more predictable under policy changes.
• Partition explosion can raise infrastructure overhead.

my take

Policy-aware partitioning is a practical fix for cache convenience becoming a security liability.

linkage

• [[retrieval entitlement middleware enforces row level guardrails]]
• [[policy aware caching cuts hallucination regressions]]
• [[evidence review on retrieval entitlement failures]]

ending questions

which partitioning boundary gives the best security gain per infrastructure cost?