#1Tools for implementing, analyzing, breaking, and implementing cryptographic systems and algorithms.
Kitploit recommended

The OWASP Cheat Sheet Series was created to provide a concise collection of high value information on specific application security topics.
Full-node Bitcoin client that validates transactions and blocks on the peer-to-peer network, with integrated wallet, cryptographic security, and…

Set up your own IPsec VPN server in just a few minutes, with IPsec/L2TP, Cisco IPsec and IKEv2. Supports Ubuntu, Debian, CentOS/RHEL, Alpine Linux…

The Secure CommsOS™ for mission-critical operations

Linux kernel source tree

Curated collection of wordlists for security assessments, including usernames, passwords, URLs, fuzzing payloads, and sensitive data patterns for…

Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS

General purpose TLS and crypto library

Free universal database tool and SQL client

A tool for secrets management, encryption as a service, and privileged access management

🔍 A Hex Editor for Reverse Engineers, Programmers and people who value their retinas when working at 3 AM.

Curated macOS security and privacy guide with practical instructions for threat modeling, disk encryption, firewall configuration, secure…

The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis

The easiest, most secure way to use WireGuard and 2FA.

bluetooth mesh chat, IRC vibes

Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any…

World's fastest and most advanced password recovery utility

eBPF-based Networking, Security, and Observability