Rebex Security

XTS-AES and other handy security classes for .NET

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Standards and platform support

100% managed .NET code with no external dependencies 

  • Rebex Security is written in 100% managed C# code.
  • No external dependencies. It only needs .NET.
  • No third-party or open source code used.
  • Fully CLS-compliant.
  • Supports any .NET language (C#, VB.NET, C++/CLI, etc.)
  • Platform-independent code. Same assemblies for both 32-bit and 64-bit applications.

.NET Framework on Windows 

Rebex Security supports the following .NET Framework platforms:

  • .NET Framework 4.8
  • .NET Framework 4.7.x
  • .NET Framework 4.6.x
  • .NET Framework 4.5.x
  • .NET Framework 4.0
  • .NET Framework 3.5 SP1
  • Both 32-bit and 64-bit versions (same DLLs)

Legacy binaries for .NET Framework 2.0/3.0 are available as well.
For details and a trial version download link, see Support for Legacy Platforms.

Supported IDE versions:

  • Microsoft Visual Studio 2019
  • Microsoft Visual Studio 2017
  • Microsoft Visual Studio 2015
  • Microsoft Visual Studio 2013
  • Microsoft Visual Studio 2012

Supported Windows versions:

Rebex Security is also known to work on Windows 8, Windows Vista, Windows XP SP3, Windows Server 2003 R2, Windows Embedded Standard 2009 and Windows Embedded POSReady 2009. However, these platforms already reached end-of-life (most of them many years ago), which means we cannot guarantee support for Rebex Security on these operating systems.

.NET Core 

Rebex Security supports .NET Core platform.

Supported frameworks:

Supported operating systems:

  • Windows 10
  • Windows 10 IoT (.NET Core 3.1 and 3.0)
  • Windows 8.1
  • Windows 7 SP1 (end-of-life platform)
  • Windows Server 2008 R2 SP1 (end-of-life platform)
  • Linux
  • macOS
  • Same DLLs for all platforms (32-bit x86, 64-bit x64, ARM)

.NET Standard 

Rebex Security supports .NET Standard 2.1 on .NET Core 3.1 (or higher). It also supports .NET Standard 2.0 on .NET Core 2.0 (or higher), Mono 5.14 (or higher), Xamarin.Android 9.1 (or higher) and Xamarin.iOS 12.3 (or higher). Support for .NET Standard 2.0 on Universal Windows Platform (build 16299 or higher) and Xamarin.Mac (version 3.8 or higher) is experimental.

Mono on Linux 

Rebex Security supports Mono 4.x/5.x/6.x on Linux and macOS.


  • Visual Studio with Xamarin.iOS 12.3 or later
  • iOS 10.2 or later

To target Xamarin.iOS platform, reference .NET Standard 2.0 binaries.


  • Visual Studio with Xamarin.Android 9.1 or later

To target Xamarin.Android platform, reference .NET Standard 2.0 binaries.


Rebex Security features experimental support for Xamarin.Mac 3.8 or later via .NET Standard 2.0.

Universal Windows Platform 

Rebex Security features experimental support for Universal Windows Platform (UWP/UAP) applications on Windows 10 via .NET Standard 2.0.

Supported platforms:

  • Windows 10 (version 1709 or higher)
  • Windows 10 IoT (version 1709 or higher)

In order to use Rebex Security on these platforms, make sure to specify at least Windows 10 Fall Creators Update (10.0; Build 16299) in your Universal Windows project.

Legacy platform support 

Legacy edition of Rebex Security for the following platforms is available as a separate product:

  • .NET Compact Framework 3.5/3.9
  • .NET Framework 2.0/3.0

Legacy platforms are platforms that are no longer covered by our Standard Support, but have not yet reached End of Life. For details, see the following KB articles:

.NET Compact Framework 

Rebex Security supports .NET Compact Framework on Microsoft's legacy embedded, handheld and mobile platforms based on Windows CE.

Supported frameworks:

  • .NET Compact Framework 3.9
  • .NET Compact Framework 3.5

Supported operating systems:

  • Windows Embedded Compact 2013
  • Windows Embedded Compact 7
  • Windows Embedded Handheld 6.5 (end-of-life platform)
  • Windows Embedded CE 6.0 (end-of-life platform)
  • Windows CE 5.0 (end-of-life platform)
  • Windows Mobile 5.0, 6.0, 6.1, 6.5 (end-of-life platforms)

Supported IDE versions:

  • Microsoft Visual Studio 2013
  • Microsoft Visual Studio 2012
  • Microsoft Visual Studio 2008 (end-of-life environment)

Please note .NET Compact Framework is a legacy platform, which means that Rebex Security for .NET CF is available as a separate product with different lifecycle and pricing.

Supported cryptographic algorithms 

FileEncryption object supports:

  • XTS-AES, a standard algorithm for protection of stored data defined by IEEE P1619
  • AES in CBC mode
  • 3DES in CBC mode
  • Twofish in CBC mode
  • PBKDF2, a password-based key derivation function specified by RFC 2898

XtsStream object supports:

  • XTS-AES, a standard algorithm for protection of stored data defined by IEEE P1619

Stand-alone cryptographic algorithms:

  • Cryptographic Message Syntax (PKCS #7) SignedData
  • Cryptographic Message Syntax (PKCS #7) EnvelopedData
  • Twofish symmetric cipher
  • Blowfish symmetric cipher
  • RC2 symmetric cipher
  • ArcFour symmetric cipher (compatible with RC4)
  • MD4 legacy hash algorithm
  • MD5 legacy hash algorithm
  • RSA public-key cryptography
  • DSA public-key cryptography
  • Diffie-Hellman key exchange algorithm

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