forge - A native implementation of TLS in Javascript and tools to write crypto-based and network-heavy webapps

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A native implementation of TLS (and various other cryptographic tools) in JavaScript. The Forge software is a fully native implementation of the TLS protocol in JavaScript, a set of cryptography utilities, and a set of tools for developing Web Apps that utilize many network resources.

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BouncyCastle - Lightweight Cryptography API for Java and CSharp

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Bouncy Castle Crypto APIs is a lightweight cryptography API for Java and CSharp. It has provider for the Java Cryptography Extension and the Java Cryptography Architecture. It supports TLS, PKCS7, PKCS12, OpenPGP, S/MIME, OCSP, TSP, CMP, Extended Access Control, ASN and lot more.

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NaCL - Networking and Crytography library

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NaCl is a new easy-to-use high-speed software library for network communication, encryption, decryption, signatures, etc. NaCl provides a simple crypto_box function that does everything in one step. The function takes the sender's secret key, the recipient's public key, and a message, and produces an authenticated ciphertext.

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libsodium - A modern and easy-to-use crypto library.

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Sodium is a new, easy-to-use software library for encryption, decryption, signatures, password hashing and more. It is a portable, cross-compilable, installable, packageable fork of NaCl, with a compatible API, and an extended API to improve usability even further. Its goal is to provide all of the core operations needed to build higher-level cryptographic tools.

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Pkcs11Interop - Managed .NET wrapper for unmanaged PKCS#11 libraries

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PKCS#11 is cryptography standard maintained by the OASIS PKCS 11 Technical Committee (originally published by RSA Laboratories) that defines ANSI C API to access smart cards and other types of cryptographic hardware.Pkcs11Interop is managed library written in C# that brings full power of PKCS#11 API to the .NET environment. It loads unmanaged PKCS#11 library provided by the cryptographic device vendor and makes its functions accessible to .NET application.

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