BouncyCastle 1.8.4

The Bouncy Castle Crypto package is a C\# implementation of cryptographic algorithms and protocols, it was developed by the Legion of the Bouncy Castle, a registered Australian Charity, with a little help! The Legion, and the latest goings on with this package, can be found at []( In addition to providing basic cryptography algorithms, the package also provides support for CMS, TSP, X.509 certificate generation and a variety of other standards such as OpenPGP.

There is a newer version of this package available.
See the version list below for details.
Install-Package BouncyCastle -Version 1.8.4
dotnet add package BouncyCastle --version 1.8.4
<PackageReference Include="BouncyCastle" Version="1.8.4" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add BouncyCastle --version 1.8.4
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

This is the final feature release with support for legacy .NET platforms. From 1.9.0 we will be targeting more modern .NET frameworks (see and updating our build and packaging systems. The 1.8.x series will continue to receive bug fixes, but limited new functionality.
Defects Fixed
Rfc3211WrapEngine would not properly handle messages longer than 127 bytes. This has been fixed.
Additional Features and Functionality
Restrictions on the output sizes of the Blake2b/s digests have been removed.
RFC 7748: Higher-level support for X25519 and X448 has been added.
RFC 8032: Higher-level support for Ed25519 and Ed448 has been added.
Implementation of the SM4 block cipher has been added.
Added support for Plain ECDSA (a.k.a CVC-ECDSA).


This package has no dependencies.

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Version History

Version Downloads Last updated
1.8.5 417,886 3/25/2019
1.8.4 443,858 11/2/2018 261,376 10/2/2018
1.8.2 997,868 4/14/2018
1.8.1 4,212,019 4/26/2016
1.7.0 1,926,387 4/30/2011