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  1. Home
  2. Category
  3. Security & Cryptography
🔒Category

Security & Cryptography is a mini landing page

Use this route to compare repositories that solve the same problem lane. The first read should tell you who leads the category, which language dominates it, and whether the surface is concentrated in a few repositories or spread across several active contenders.

Leader

bitcoin/bitcoin

89.7K stars

Top repository in the all time category snapshot.

Dominant language

Go

7 repos

Go (7), Python (5), Unknown (4)

Shape insight

24% concentration

86 repos tracked

Top-three concentration shows whether this category is flagship-heavy or broad.

Recent activity coverage

27 recently active

All Time

Snapshot updated 2026-07-30.

Compare nearby reposRead methodology
1
bitcoin/bitcoin
89.7K stars·C++·39.2K forks·2 days ago

Bitcoin Core integration/staging tree

2
Developer-Y/cs-video-courses
82.8K stars·Unknown·11.4K forks·3 weeks ago

List of Computer Science courses with video lectures.

3
caddyserver/caddy
74.5K stars·Go·4.9K forks·Yesterday

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

4
GyulyVGC/sniffnet
40.2K stars·Rust·1.8K forks·6 days ago

Comfortably monitor your Internet traffic 🕵️‍♂️

5
QuivrHQ/quivr
39.4K stars·Python·3.7K forks·1 years ago

Opiniated RAG for integrating GenAI in your apps 🧠 Focus on your product rather than the RAG. Easy integration in existing products with customisation! Any LLM: GPT4, Groq, Llama. Any Vectorstore: PGVector, Faiss. Any Files. Anyway you want.

6
aquasecurity/trivy
37.1K stars·Go·559 forks·Yesterday

Find vulnerabilities, misconfigurations, secrets, SBOM in containers, Kubernetes, code repositories, clouds and more

7
lissy93/web-check
34.3K stars·TypeScript·2.8K forks·2 days ago

🕵️‍♂️ All-in-one OSINT tool for analysing any website

8
TheAlgorithms/JavaScript
34.2K stars·JavaScript·5.9K forks·4 months ago

Algorithms and Data Structures implemented in JavaScript for beginners, following best practices.

9
anoma/anoma
33.7K stars·Elixir·4.1K forks·1 months ago

Reference implementation of Anoma

10
OWASP/CheatSheetSeries
32.7K stars·Python·4.5K forks·Yesterday

The OWASP Cheat Sheet Series was created to provide a concise collection of high value information on specific application security topics.

11
nginx/nginx
31.3K stars·C·8.2K forks·2 days ago

The official NGINX Open Source repository.

12
openssl/openssl
30.5K stars·C·11.4K forks·Yesterday

General purpose TLS and crypto library

13
trailofbits/algo
30.3K stars·Python·2.4K forks·2 days ago

Set up a personal VPN in the cloud

14
imthenachoman/How-To-Secure-A-Linux-Server
30K stars·Unknown·2K forks·2 weeks ago

An evolving how-to guide for securing a Linux server.

15
community-scripts/ProxmoxVE
29.1K stars·Shell·2.8K forks·Yesterday

Proxmox VE Helper-Scripts (Community Edition)

16
Infisical/infisical
28.5K stars·TypeScript·2.2K forks·Yesterday

Infisical is the open-source platform for secrets, certificates, and privileged access management.

17
authelia/authelia
28.4K stars·Go·1.4K forks·2 days ago

The Single Sign-On Multi-Factor portal for web apps, now OpenID Certified™

18
gitleaks/gitleaks
28.4K stars·Go·2.2K forks·2 days ago

Find secrets with Gitleaks 🔑

19
digitalocean/nginxconfig.io
28.3K stars·JavaScript·2K forks·1 years ago

⚙️ NGINX config generator on steroids 💉

20
hwdsl2/setup-ipsec-vpn
28.3K stars·Shell·6.5K forks·6 days ago

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 and Raspberry Pi OS. Includes client config and management scripts.

21
keepassxreboot/keepassxc
28.2K stars·C++·1.9K forks·1 weeks ago

KeePassXC is a cross-platform community-driven port of the Windows application “KeePass Password Safe”.

22
OpenZeppelin/openzeppelin-contracts
27.2K stars·Solidity·12.4K forks·Yesterday

OpenZeppelin Contracts is a library for secure smart contract development.

23
mukul975/Anthropic-Cybersecurity-Skills
26.9K stars·Python·3.3K forks·1 months ago

817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io standard · Works with Claude Code, GitHub Copilot, Codex CLI, Cursor, Gemini CLI & 20+ platforms · 29 security domains · Apache 2.0

24
cilium/cilium
24.8K stars·Go·3.9K forks·Yesterday

eBPF-based Networking, Security, and Observability

25
osquery/osquery
23.4K stars·C++·2.6K forks·2 days ago

SQL powered operating system instrumentation, monitoring, and analytics.

26
slimtoolkit/slim
23.4K stars·Go·838 forks·1 months ago

Slim(toolkit): Don't change anything in your container image and minify it by up to 30x (and for compiled languages even more) making it secure too! (free and open source)

27
shieldfy/API-Security-Checklist
23.3K stars·Unknown·2.7K forks·1 weeks ago

Checklist of the most important security countermeasures when designing, testing, and releasing your API

28
getsops/sops
22.6K stars·Go·1.1K forks·4 days ago

Simple and flexible tool for managing secrets

29
goauthentik/authentik
22.5K stars·Python·1.7K forks·Yesterday

The authentication glue you need.

30
drduh/macOS-Security-and-Privacy-Guide
22.5K stars·Unknown·1.5K forks·2 days ago

Community guide to securing and improving privacy on macOS.

#RepositoryLanguageStars🍴 ForksUpdated
1
bitcoin/bitcoin

Bitcoin Core integration/staging tree

C++89.7K39.2K2 days ago
2
Developer-Y/cs-video-courses

List of Computer Science courses with video lectures.

Unknown82.8K11.4K3 weeks ago
3
caddyserver/caddy

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

Go74.5K4.9KYesterday
4
GyulyVGC/sniffnet

Comfortably monitor your Internet traffic 🕵️‍♂️

Rust40.2K1.8K6 days ago
5
QuivrHQ/quivr

Opiniated RAG for integrating GenAI in your apps 🧠 Focus on your product rather than the RAG. Easy integration in existing products with customisation! Any LLM: GPT4, Groq, Llama. Any Vectorstore: PGVector, Faiss. Any Files. Anyway you want.

Python39.4K3.7K1 years ago
6
aquasecurity/trivy

Find vulnerabilities, misconfigurations, secrets, SBOM in containers, Kubernetes, code repositories, clouds and more

Go37.1K559Yesterday
7
lissy93/web-check

🕵️‍♂️ All-in-one OSINT tool for analysing any website

TypeScript34.3K2.8K2 days ago
8
TheAlgorithms/JavaScript

Algorithms and Data Structures implemented in JavaScript for beginners, following best practices.

JavaScript34.2K5.9K4 months ago
9
anoma/anoma

Reference implementation of Anoma

Elixir33.7K4.1K1 months ago
10
OWASP/CheatSheetSeries

The OWASP Cheat Sheet Series was created to provide a concise collection of high value information on specific application security topics.

Python32.7K4.5KYesterday
11
nginx/nginx

The official NGINX Open Source repository.

C31.3K8.2K2 days ago
12
openssl/openssl

General purpose TLS and crypto library

C30.5K11.4KYesterday
13
trailofbits/algo

Set up a personal VPN in the cloud

Python30.3K2.4K2 days ago
14
imthenachoman/How-To-Secure-A-Linux-Server

An evolving how-to guide for securing a Linux server.

Unknown30K2K2 weeks ago
15
community-scripts/ProxmoxVE

Proxmox VE Helper-Scripts (Community Edition)

Shell29.1K2.8KYesterday
16
Infisical/infisical

Infisical is the open-source platform for secrets, certificates, and privileged access management.

TypeScript28.5K2.2KYesterday
17
authelia/authelia

The Single Sign-On Multi-Factor portal for web apps, now OpenID Certified™

Go28.4K1.4K2 days ago
18
gitleaks/gitleaks

Find secrets with Gitleaks 🔑

Go28.4K2.2K2 days ago
19
digitalocean/nginxconfig.io

⚙️ NGINX config generator on steroids 💉

JavaScript28.3K2K1 years ago
20
hwdsl2/setup-ipsec-vpn

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 and Raspberry Pi OS. Includes client config and management scripts.

Shell28.3K6.5K6 days ago
21
keepassxreboot/keepassxc

KeePassXC is a cross-platform community-driven port of the Windows application “KeePass Password Safe”.

C++28.2K1.9K1 weeks ago
22
OpenZeppelin/openzeppelin-contracts

OpenZeppelin Contracts is a library for secure smart contract development.

Solidity27.2K12.4KYesterday
23
mukul975/Anthropic-Cybersecurity-Skills

817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io standard · Works with Claude Code, GitHub Copilot, Codex CLI, Cursor, Gemini CLI & 20+ platforms · 29 security domains · Apache 2.0

Python26.9K3.3K1 months ago
24
cilium/cilium

eBPF-based Networking, Security, and Observability

Go24.8K3.9KYesterday
25
osquery/osquery

SQL powered operating system instrumentation, monitoring, and analytics.

C++23.4K2.6K2 days ago
26
slimtoolkit/slim

Slim(toolkit): Don't change anything in your container image and minify it by up to 30x (and for compiled languages even more) making it secure too! (free and open source)

Go23.4K8381 months ago
27
shieldfy/API-Security-Checklist

Checklist of the most important security countermeasures when designing, testing, and releasing your API

Unknown23.3K2.7K1 weeks ago
28
getsops/sops

Simple and flexible tool for managing secrets

Go22.6K1.1K4 days ago
29
goauthentik/authentik

The authentication glue you need.

Python22.5K1.7KYesterday
30
drduh/macOS-Security-and-Privacy-Guide

Community guide to securing and improving privacy on macOS.

Unknown22.5K1.5K2 days ago

Next step after the category scan

Open compare mode for a side-by-side read, move to the category hub, or review the guide when you need a stronger frame for what stars and activity are showing here.
Open compareBrowse all categoriesRead the guide

Learn and methodology

Keep trust-building context reachable, but behind the first data read instead of ahead of it.
GuideMethodologyArticlesWeekly Digest

How to use this category view

Category pages are most useful when you compare similar kinds of projects rather than treating the top row as an automatic recommendation list. Look at star concentration, language mix, and recent activity together to decide whether a category is dominated by a few established leaders or by a broader set of active tools.

Ranking methodology

Repositories are filtered by the "security" topic and ranked by stars. We apply additional content filtering to exclude offensive security tools, focusing on defensive and educational projects that comply with advertising policies.

Data is sourced from the GitHub REST API and updated daily. Star counts reflect cumulative community interest over the lifetime of each repository. See Methodology & Editorial Standards for broader context.