Solution Brief

Semantic Defense Against Prompt Injection

Prompt InjectionSemantic DefenseRuntime

Stop Adversarial Prompts Before They Reach Your Agents

Still relying on pattern lists that attackers bypass in the first conversation?

Prompt injection has no fixed signature — attackers adapt faster than your blocklists. AgentTrust OS applies a two-layer semantic defense: a confidence gate flags suspicious intent first, then an LLM judge evaluates scope before any agent action executes. Decisions are enforced in real time, not after the damage is done.

Download this Solution Brief to learn how to:

  • ✓Catch adversarial payloads before any tool call or business action runs
  • ✓Score confidence and intent without brittle keyword or regex lists
  • ✓Block prompt injection attacks that evade every pattern-matching filter
Solution Briefs ↗

More from the platform

Explore the other products and deep-dive capability briefs that complete the AgentTrust OS trust layer.

The Three-Layer Trust Platform

Core Products

Capability Deep-Dives

What the platform eliminates

Deterministic Enforcement

Make Every Governance Decision Outside the Model

Four injection-proof, model-free deterministic gates evaluate every request before an LLM ever sees the payload — the decision is made and enforced entirely outside the model.

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Framing Attack Prevention

Defeat Framing Attacks That Keyword Filters Miss

Intent-based, pre-execution defense scores confidence first then runs semantic intent evaluation — catches framing attacks without keyword lists that attackers trivially bypass.

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Behavioral Intelligence

See Salami Campaigns Across the Full Conversation

Behavioral drift tracking compares each agent's history and fleet baselines across turns — salami campaign injections that look innocuous message-by-message become visible as a pattern.

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Architecture Hardening

Remove the Model from Your Enforcement Path

Deterministic-first architecture puts four gates in front of every request — the async LLM judge enriches the audit record after the fact, but it never touches the verdict.

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