Arc Sentry: Advanced Prompt Injection Detector for LLMs

Been working on Arc Sentry, a whitebox prompt injection detector for self-hosted LLMs (Mistral, Llama, Qwen). Most detectors pattern-match on known attack phrases. Arc Sentry watches what the prompt does to the model’s internal representation instead, so it catches indirect, hypothetical, and roleplay-framed attacks that get through keyword filters. Benchmark on indirect/roleplay/technical prompts (40 OOD prompts): • Arc Sentry: Recall 0.80, F1 0.84 • OpenAI Moderation API: Recall 0.75, F1 0.86 • LlamaGuard 3 8B: Recall 0.55, F1 0.71 Arc Sentry has the highest recall — it catches more of the hard cases. Blocks before model.generate() is called. The lightweight pre-filter runs on CPU with no model access. pip install arc-sentry GitHub: https://github.com/9hannahnine-jpg/arc-sentry Happy to answer questions about how it works.

Arc Sentry: Advanced Prompt Injection Detector for LLMs

In the rapidly evolving landscape of artificial intelligence, Large Language Models (LLMs) have become indispensable tools for various applications. However, their susceptibility to prompt injection attacks poses significant security risks. Enter Arc Sentry , an advanced prompt injection detector designed to safeguard LLMs from malicious inputs.

Understanding Prompt Injection

Prompt injection occurs when an attacker manipulates the input prompts to an LLM, causing it to produce unintended or harmful outputs. This can lead to data breaches, unauthorized actions, and other serious security issues.

How Arc Sentry Works

Arc Sentry employs state-of-the-art machine learning algorithms to detect and mitigate prompt injection attacks in real-time. By analyzing the structure, syntax, and semantic content of input prompts, Arc Sentry effectively identifies and neutralizes potential threats before they can cause harm.

Use Cases for Arc Sentry

1. Enterprise Security

Large organizations relying on LLMs for customer support, data analysis, and other critical functions can use Arc Sentry to protect their systems from malicious inputs, ensuring data integrity and privacy.

2. Chatbot and Virtual Assistant Protection

Chatbots and virtual assistants are prime targets for prompt injection attacks. Arc Sentry can be integrated into these systems to safeguard users and maintain the integrity of interactions.

3. Content Generation and Moderation

For platforms that generate or moderate content based on user inputs, Arc Sentry provides an additional layer of security, ensuring that generated content is safe and compliant with guidelines.

4. Educational Tools

Educational institutions using LLMs for customized learning experiences can deploy Arc Sentry to protect against misinformation and malicious use of the models.

5. Financial Services

Financial institutions that use LLMs for fraud detection, customer service, and risk assessment can benefit from Arc Sentry's robust security measures, protecting sensitive financial data.

Benefits of Using Arc Sentry

1. Enhanced Security

Arc Sentry provides a comprehensive defense mechanism against prompt injection attacks, safeguarding your LLM applications from unauthorized access and malicious activities.

2. Real-Time Detection

The advanced algorithms in Arc Sentry enable real-time detection and mitigation of prompt injection threats, ensuring continuous and uninterrupted service.

3. Compliance and Regulations

By protecting LLMs from aberrant inputs, Arc Sentry helps organizations comply with data protection regulations and industry standards.

4. User Safeguarding

With Arc Sentry monitoring your applications, you can guarantee a safer experience for your users and consumers.

5. High Accuracy and Efficiency

The AI-driven detection system operates with high precision, minimizing false positives and negating potential performance overheads caused by adding safety measures.

6. Customizable Security

Arc Sentry offers flexibility in configuration, enabling different security thresholds and response mechanisms tailored to the specific use cases of the models in play.

FAQs

Q. What is the primary function of Arc Sentry?

A. The primary function of Arc Sentry is detecting and neutralizing prompt injection attempts, thereby protecting LLMs from malicious inputs.

Q. How does Arc Sentry identify prompt injection threats?

A. Arc Sentry identifies prompt injection threats by analyzing the structure, syntax, and semantic content of input prompts using advanced machine learning algorithms.

Q. Can Arc Sentry be integrated with existing LLM applications?

A. Yes, Arc Sentry can be seamlessly integrated with existing LLM applications to provide real-time protection against prompt injection attacks.

Q. What types of organizations can benefit from Arc Sentry?

A. Arc Sentry is beneficial for organizations across various sectors, including finance, education, content generation, and customer service, where LLMs are used extensively.

Q. Does Arc Sentry impact the performance of LLM applications?

A. No, Arc Sentry has been carefully developed to ensure minimal impact on the performance of LLM applications, maintaining high efficiency and accuracy.

Q. How does Arc Sentry handle real-time detection and mitigation?

A. Arc Sentry uses advanced AI to analyze and respond to threats in real-time, ensuring continuous and uninterrupted service without unduly affecting performance.

Get in touch with us today to secure your LLMs with Arc Sentry and ensure that your applications remain safe and reliable.

Arc Sentry: Advanced Prompt Injection Detector for LLMs