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Top 23 C# Security Projects
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Harden-Windows-Security
Harden Windows Safely, Securely using Official Supported Microsoft methods and proper explanation | Always up-to-date and works with the latest build of Windows | Provides tools and Guides for Personal, Enterprise, Government and Military security levels | Read The Rationale https://github.com/HotCakeX/Harden-Windows-Security/blob/main/Rationale.md
Project mention: HotCakeX – All-in-one Windows hardening solution | news.ycombinator.com | 2024-11-26 -
ipban
Since 2011, IPBan is the worlds most trusted, free security software to block hackers and botnets. With both Windows and Linux support, IPBan has your dedicated or cloud server protected. Upgrade to IPBan Pro today and get a discount. Learn more at ↓
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itext-dotnet
iText for .NET is the .NET version of the iText library, formerly known as iTextSharp, which it replaces. iText represents the next level of SDKs for developers that want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit and enha
Project mention: Show HN: IPA – a GUI for exploring inner details of PDF | news.ycombinator.com | 2024-08-28If you're not a customer, we'll explain the benefits of becoming a customer.
I avoid them because everything about their approach to the AGPL suggests that they chose it as a marketing technique for their paid products, not out of a serious commitment to free software.
[0] https://itextpdf.com/how-buy/AGPLv3-license
[1] https://github.com/itext/itext-dotnet/blob/develop/itext/ite...
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jose-jwt
Ultimate Javascript Object Signing and Encryption (JOSE), JSON Web Token (JWT) and Json Web Keys (JWK) Implementation for .NET and .NET Core
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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DevSkim
DevSkim is a set of IDE plugins, language analyzers, and rules that provide security "linting" capabilities.
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SimpleIdServer
OpenID, OAuth 2.0, SCIM2.0, UMA2.0, FAPI, CIBA & OPENBANKING Framework for ASP.NET Core
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ad-password-protection
Active Directory password filter featuring breached password checking and custom complexity rules
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cervantes
Cervantes is an open-source, collaborative platform designed specifically for pentesters and red teams. It serves as a comprehensive management tool, streamlining the organization of projects, clients, vulnerabilities, and reports in a single, centralized location. (by CervantesSec)
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C# Security discussion
C# Security related posts
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HotCakeX – All-in-one Windows hardening solution
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Refix: Fast, Debuggable, Reproducible Builds
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Anyone using Tiny11 (or otherwise minimised debloated Windows) with a Surface?
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Open source vulnerability scanner
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SecureStore VS dotenv-vault - a user suggested alternative
2 projects | 4 Nov 2023 -
Fail2Ban – Daemon to ban hosts that cause multiple authentication errors
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.NET developers alert: Moq NuGET package exfiltrates user emails from git
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A note from our sponsor - CodeRabbit
coderabbit.ai | 17 Mar 2025
Index
What are some of the best open-source Security projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | privatezilla | 3,613 |
| 2 | pingcastle | 2,458 |
| 3 | Harden-Windows-Security | 2,294 |
| 4 | ipban | 1,764 |
| 5 | itext-dotnet | 1,748 |
| 6 | BouncyCastle | 1,731 |
| 7 | jose-jwt | 960 |
| 8 | security-code-scan | 951 |
| 9 | DevSkim | 929 |
| 10 | bcrypt.net | 881 |
| 11 | SimpleIdServer | 791 |
| 12 | Samples | 647 |
| 13 | SecurityDriven.Inferno | 580 |
| 14 | ad-password-protection | 509 |
| 15 | Phishious | 472 |
| 16 | nUpdate | 449 |
| 17 | TwoFactorAuth.Net | 340 |
| 18 | KeePassWinHello | 335 |
| 19 | cervantes | 292 |
| 20 | Pkcs11Interop | 276 |
| 21 | FireFox-Thief | 256 |
| 22 | Subdominator | 241 |
| 23 | SecureFolderFS | 221 |
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