Pkcs11Interop.X509Store

Easy to use PKCS#11 based X.509 certificate store. The PKCS#11 API offers unparalleled versatility and functionality across platforms and cryptographic scenarios

CryptoNet

CryptoNet is simple, fast, and a lightweight asymmetric and symmetric encryption NuGet library supporting .NET Standard 2.0 and C# 8.0 for cross platforms Windows, Linux, and iOS. It is a 100% native C# implementation based on Microsoft cryptography. It does not depend on other libraries.

SecurityDriven.Inferno

.NET crypto library. Professionally audited.

StreamCryptor

Stream encryption & decryption with libsodium and protobuf.

Pkcs11Interop

Managed .NET wrapper for unmanaged PKCS#11 libraries that provide access to the cryptographic hardware

Paseto.Core

A Paseto (Platform-Agnostic Security Tokens) implementation for .NET

NaCl.Core

A managed-only cryptography library for .NET which provides modern cryptographic primitives.

HashLib

HashLib is a collection of nearly all hash algorithms you've ever seen, it supports almost everything and is very easy to use. Fork from original project on Codeplex.

BouncyCastle

Together with the .Net System.Security.Cryptography, the reference implementation for cryptographic algorithms on the CLR.