Prompt Firewall is a powerful Chrome Extension designed to safeguard sensitive personal information, including Personally Identifiable Information (PII), for both individuals and businesses. This browser add-on offers a range of features specifically tailored to enhance the privacy of data processed by large language models (LLMs) such as ChatGPT.

One of the key features of Prompt Firewall is its PII Detection capability. The extension utilizes specially designed algorithms to detect PII in user inputs. If any PII is detected during an interaction with an LLM like ChatGPT, Prompt Firewall immediately displays an alert screen to inform the user. Users can create their own list of private information and utilize existing detection techniques, adding an extra layer of protection for their privacy. The supported private information includes Privacy Alias, IBAN Codes, Phone Numbers, Crypto Addresses, Credit Card Numbers, Email Addresses, and Secret Keys.

Another notable feature of Prompt Firewall is the Plugin Guard, which helps detect different types of injection attacks, such as direct and indirect prompt injections. By enabling the webpilot plugin, users can benefit from this enhanced security feature.

To further protect Personally Identifiable Information (PII), Prompt Firewall leverages synthetic data. These artificial data are generated based on real data, ensuring the processing of real user data when interacting with Large Language Models (LLMs) like ChatGPT.

It is important to note that the Prompt Firewall Chrome Extension runs entirely locally, meaning that your private data is not sent anywhere. This ensures maximum privacy and security for users.