Advanced LLM Security Gateway | FastAPI + PII Masking + Injection Detection

Final Lab Project – Advanced LLM Security Gateway
In this project, I designed and implemented an Advanced LLM Security Gateway to protect AI systems from malicious prompts, sensitive data exposure, and unsafe requests before they reach the language model.
The gateway acts as a lightweight but powerful security layer for LLM applications and processes every request through multiple intelligent stages.
🔐 Core Features
Prompt Injection Detection
PII Analysis & Masking
Hybrid Security Validation
Multilingual Request Handling
Allow / Block / Mask Decision Engine
FastAPI Backend Integration
Secure API Processing Pipeline
⚡ Technologies Used
FastAPI
Python
Microsoft Presidio
Regex + NLP Validation
REST APIs
LLM Security Concepts
🛡️ Security Workflow
Incoming user request
Injection analysis
Sensitive data detection
Decision engine (ALLOW / BLOCK / MASK)
Safe request forwarded to LLM
📌 Project Highlights
✅ 98% Accuracy
✅ Hybrid Detection Architecture
✅ Real-Time Processing
✅ Scalable Backend Design
✅ Multilingual Support

#LLM #AI #CyberSecurity #FastAPI #Python #PromptInjection #Presidio #MachineLearning #AISecurity #backenddevelopment

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