BinaryShield: Cross-Service Threat Intelligence in LLM Services using Privacy-Preserving Fingerprints

BinaryShield is the first privacy-preserving threat intelligence system that enables secure sharing of attack fingerprints across compliance boundaries for LLM services. The system addresses the critical security gap where organizations cannot share prompt injection attack intelligence between services due to privacy regulations, achieving an F1-score of 0.94 while providing 38x faster similarity search than dense embeddings.