Everyone thinks LLM leaks are “model problems.”...
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Everyone thinks LLM leaks are “model problems.” Actually: they’re architecture problems. Here’s the framework I use in production Access, Context, Output. ⚡ The Over-Entitled Retriever Insight: Most leaks happen before generation because your retriever sees too much • Enforce row-level ACLs → filter before embedding search • Partition vector indexes by tenant → zero cross-org bleed • Sign queries with user identity → audit every retrieval Result: 100% tenant isolation. Zero accidental cross-access — ⚡ The Prompt Injection Trap Insight: A single malicious sentence can override your system prompt. “Ignore previous instructions…” → goodbye guardrails. • Strip tool instructions from retrieved text → no tool hijacking • Freeze system prompts server-side → never client-controlled • Run injection classifier → block risky queries pre-generation Payoff: 80% of jailbreak attempts stopped before inference. — ⚡ The Memory Time Bomb Insight: Long-term memory becomes long-term liability. • Encrypt embeddings at rest → reduce blast radius • Set TTL on conversation memory → auto-expire after 24h • Disable training retention → no vendor data reuse Outcome: Sensitive data lifespan drops from months to hours. — ⚡ The Output Spill Insight: The model can echo secrets it shouldn’t. Especially in summarization and Q&A. • Add regex + NER redaction → mask PII before response • Apply policy LLM pass → secondary compliance filter • Log every response with hash → traceability under 200ms Result: 90% fewer policy violations. — Secure LLM ≠ better prompts. It’s layered defense. Access → Context → Output. 🔖 Save this before your next security review 💬 Comment “SECURE” if you also building safe LLM Appa ➕ Follow for production-grade AI system design breakdowns

0:09 Feb 23, 2026 9,369 187
@techwithprateek
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