Best open-source Security projects

Self-hosted home security camera system for Raspberry Pi with end-to-end encrypted live video, alerts, and recordings on your phone.

A Python CLI that locks your desktop automatically when your paired Bluetooth phone or smartwatch moves out of range.

Android app that scans nearby Bluetooth Low Energy devices, analyzes their broadcast data, and alerts you to suspicious or following devices.

Open-source Rust firmware that turns a cheap Raspberry Pi RP2350 board into a USB security key for passkeys, SSH/git signing, OpenPGP, PIV and TOTP.

A CLI tool that finds leaked credentials across Git, cloud storage, chat and other sources, and checks whether each one is still live.

Converts untrusted PDFs, office documents, and images into safe PDFs by rendering every page as pixels inside a sandbox.

Android firewall that blocks per-app network access without using a VPN, driven by Shizuku, local ADB or root.

A self-hosted web application firewall and reverse proxy that filters HTTP traffic to block attacks like SQL injection, XSS, and bot floods.

Android and iOS app that scans for nearby Bluetooth LE signals from smart glasses (mainly Meta Ray-Ban) and sends a warning.

A messaging app and network that uses no user identifiers, with end-to-end encryption and private message routing across iOS, Android, desktop and CLI.

A web-based management platform for operating Fail2Ban across one or more Linux hosts, with centralized ban review, unban search, and alerts.

A web toolkit for analyzing any domain, covering DNS records, IP geolocation, WHOIS, and SSL/TLS certificate history.

Open-source password manager built with Flutter, compatible with KeePass 2.x (KDBX 3 and KDBX 4) databases across mobile, desktop and web.