Open Source BSD Cybersecurity Tools

justniffer is a TCP sniffer. It reassembles and reorders packets and displays the tcp flow in a customizable way. It can log network traffic in web server log format. It can also log network services performances (e.g. web server response times) and extract http content (images, html, scripts, etc)

SENTINEL is an open-source behavioral intelligence platform for detecting child grooming on digital platforms. Released by Sentinel Foundation in April 2026, it analyzes patterns of user behavior over time rather than scanning message content for keywords, identifying grooming sequences before direct harm occurs. Key capabilities: - Behavioral scoring across four signal types: linguistic register shifts, relationship graph evolution, temporal escalation patterns, and fairness gates - Tamper-evident audit logs (cryptographically chained, 7-year retention) for legal proceedings and regulatory compliance - Privacy-preserving federation: platforms share encrypted threat signatures without exposing raw messages or user identities - Demographic parity audits enforced as a deployment gate before any detection model goes live - Built-in compliance for EU Digital Services Act, UK Online Safety Act, COPPA, and GDPR Free for organizations under $100k annual revenue and all non-commerci

The In-Browser File Encrypter is a simple web application that enables you to securely encrypt your files directly in your browser using the AES-256 encryption algorithm in CBC mode. Check it out at: https://codepen.io/Northstrix/pen/xxvXvJL and https://northstrix.github.io/In-Browser-File-Encrypter/V1.0/web-app.html GitHub page: https://github.com/Northstrix/In-Browser-File-Encrypter The download shortcut: https://sourceforge.net/projects/in-browser-file-encrypter/files/V1.0%20%28Improved%20UI%29/V1.0%20%28Improved%20UI%29.zip/download Successfully tested in Google Chrome on Windows 11 and Fedora 40.

The PCS Security Technology Evaluation Tool (P-STET) is a tool funded by the I3P which allows maintainers of Critical Infrastructure systems to evaluate and compare the costs and benefits of implementing cyber security technology.

tirreno is an open-source security framework. tirreno [tir.ˈrɛ.no] helps understand, monitor, and protect your product from threats, fraud, and abuse. While classic cybersecurity focuses on infrastructure and network perimeter, most breaches occur through compromised accounts and application logic abuse that bypasses firewalls, SIEM, WAFs, and other defenses. tirreno detects threats where they actually happen: inside your product. tirreno is a few-dependency, "low-tech" PHP/PostgreSQL application. After a straightforward five-minute installation, you can ingest events through API calls and immediately access a real-time threat dashboard.