LLM Firewall

Positive Technologies Adds LLM Firewall Module to PT Application Firewall for AI Service Protection

Positive Technologies has developed the LLM Firewall module as part of its PT Application Firewall solution to secure AI services against prompt injection attacks and data leakage. The module inspects both user requests sent to large language models and the responses generated by those models, detecting attempts to bypass restrictions, extract system instructions, or misuse agent capabilities. It specifically targets prompt injections hidden in documents or direct inputs that could override the model's original instructions. Additional detection covers personal data, passwords, access keys, and toxic or prohibited content in both directions of communication. The solution integrates via OpenAI-compatible APIs and is already available in PT AF Cloud, with deployment in PT AF PRO planned for later. Organizations can configure separate policies for different AI services, choosing between monitoring and blocking modes for requests and responses independently.