The Stanford Javascript Crypto Library is a project by the Stanford Computer Security Lab to build a secure, powerful, fast, small, easy-to-use, cross-browser library for cryptography in Javascript. SJCL is secure. It uses the industry-standard AES algorithm at 128, 192 or 256 bits; the SHA256 hash function; the HMAC authentication code; the PBKDF2 password strengthener; and the CCM and OCB authenticated-encryption modes.

sjcl - Stanford Javascript Crypto Library

OpenPGP.js is a JavaScript implementation of the OpenPGP protocol. It aims to provide an Open Source OpenPGP library in JavaScript so it can be used on virtually every device. This does not require gpg on their machines in order to use the library. The idea is to implement all the needed OpenPGP functionality in a JavaScript library that can be reused in other projects that provide browser extensions or server applications. It should allow you to sign, encrypt, decrypt, and verify any kind of text - in particular e-mails - as well as managing keys. 

OpenPGP.js - OpenPGP implementation for JavaScript

cryptography is a package which provides cryptographic recipes and primitives to Python developers. Our goal is for it to be your "cryptographic standard library". It supports Python 2.7, Python 3.4+, and PyPy 5.3+. cryptography includes both high level recipes and low level interfaces to common cryptographic algorithms such as symmetric ciphers, message digests, and key derivation functions. For example, to encrypt something with cryptography's high level symmetric encryption recipe.

Cryptography - Package designed to expose cryptographic primitives and recipes to Python developers

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.

BouncyCastle - Lightweight Cryptography API for Java and CSharp

Cryptomator offers multi-platform transparent client-side encryption of your files in the cloud. Most cloud providers encrypt data only during transmission or they keep the keys for decryption for themselves. These keys can be stolen, copied, or misused. With Cryptomator, the key to your data is in your hands. Cryptomator encrypts your data quickly and easily. Afterwards you upload them protected to your favorite cloud service.
 
It works with Dropbox, Google Drive, OneDrive, MEGA, pCloud, ownCloud, Nextcloud and any other cloud storage service which synchronizes with a local directory. It uses AES encryption with 256-bit key length.

Cryptomator offers multi-platform transparent client-side encryption of your files in the cloud. Most cloud providers encrypt data only during transmission or they keep the keys for decryption for themselves. These keys can be stolen, copied, or misused. With Cryptomator, the key to your data is in your hands. Cryptomator encrypts your data quickly and easily. Afterwards you upload them protected to your favorite cloud service.



Cryptomator - Multi-platform transparent client-side encryption of your files in the cloud

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.

NaCL - Networking and Crytography library

Easy Tink provides APIs that are simple and easy to use correctly. Most cryptographic operations such as data encryption, digital signatures, etc. can be done with only a few lines of code.Security Tink reduces common cryptographic pitfalls with user-centered design, careful implementation and code reviews, and extensive testing.
 
 At Google, Tink is already being used to secure data of many products such as AdMob, Google Pay, Google Assistant, Firebase, the Android Search App, etc.

Tink is a multi-language, cross-platform library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.. Most cryptographic operations such as data encryption, digital signatures, etc. can be done with only a few lines of code. Tink reduces common cryptographic pitfalls with user-centered design, careful implementation and code reviews, and extensive testing.

Tink - Cryptographic library that provides an easy, secure, and agile API for common cryptographic tasks

CryptoJS is a growing collection of standard and secure cryptographic algorithms implemented in JavaScript using best practices and patterns. They are fast, and they have a consistent and simple interface.
CryptoJS supports MD5, SHA1, SHA256 algorithm for Hashing. It supports <span data-slate-fragment="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">Advanced Encryption Standard (AES), DES, Triple DES, Rabbit, RC4, RC4Drop.
&nbsp;

Crypto-js -  JavaScript library of crypto standards

The gnupg module allows Python programs to make use of the functionality provided by the GNU Privacy Guard (abbreviated GPG or GnuPG). Using this module, Python programs can encrypt and decrypt data, digitally sign documents and verify digital signatures, manage (generate, list and delete) encryption keys, using proven Public Key Infrastructure (PKI) encryption technology based on OpenPGP.

Python-gnupg - Python API which wraps the GNU Privacy Guard

cryptlib is a powerful security toolkit that allows even inexperienced crypto programmers to easily add encryption and authentication services to their software. It provides support for S/MIME and PGP/OpenPGP secure enveloping, SSL/TLS and SSH secure sessions, CA services such as CMP, SCEP, RTCS, and OCSP, and other security operations such as secure timestamping. 
 
cryptlib provides an extensive range of other capabilities including full X.509/PKIX certificate handling (all X.509 versions from X.509v1 to X.509v3) with additional support for SET, Microsoft AuthentiCode, Identrus, SigG, S/MIME, SSL, and Qualified certificates, PKCS #7 certificate chains, handling of certification requests and CRLs including automated checking of certificates against CRLs and online checking using RTCS and OCSP, and issuing and revoking certificates using CMP and SCEP. In addition cryptlib implements a full range of certification authority (CA) functions, as well as providing complete CMP, SCEP, RTCS, and OCSP server implementations to handle online certificate enrolment/issue/revocation and certificate status checking. Alongside the certificate handling, cryptlib provides a sophisticated key storage interface that allows the use of a wide range of key database types ranging from PKCS #11 devices, PKCS #15 key files, and PGP/OpenPGP key rings through to commercial-grade RDBMS' and LDAP directories with optional SSL protection.

cryptlib is a powerful security toolkit that allows even inexperienced crypto programmers to easily add encryption and authentication services to their software. It provides support for S/MIME and PGP/OpenPGP secure enveloping, SSL/TLS and SSH secure sessions, CA services such as CMP, SCEP, RTCS, and OCSP, and other security operations such as secure timestamping. 

Cryptlib - provides Encryption and Authentication Service

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.

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

SecureDrop is an open-source whistleblower submission system that media organizations can use to securely accept documents from and communicate with anonymous sources. It was originally created by the late Aaron Swartz and is currently managed by Freedom of the Press Foundation. Among the tools used in and around the SecureDrop application are: Tor, GnuPG encryption, Apache, OSSEC, grsecurity, Ubuntu, the Tails operating system, and an air-gap. 

SecureDrop - Whistleblower Submission System

Tcpcrypt is a protocol that attempts to encrypt (almost) all of your network traffic. Unlike other security mechanisms, Tcpcrypt works out of the box: it requires no configuration, no changes to applications, and your network connections will continue to work even if the remote end does not support Tcpcrypt, in which case connections will gracefully fall back to standard clear-text TCP.
 
We might be already using SSL, HTTPS, VPN in our network. Those solutions are inadequate for ubiquitous encryption. For example, almost all solutions rely on a PKI to stop man-in-the-middle attacks, which for ubiquitous deployment would mean that all Internet users would have to get verified by a CA like Verisign and have to spend money to buy a certificate. Tcpcrypt abstracts away authentication, allowing any mechanism to be used, whether PKI, passwords, or something else. 
 
Tcpcrypt has very high performance (up to 25x faster than SSL), making it feasible for high volume servers to enable encryption on all connections.

Tcpcrypt is a protocol that attempts to encrypt (almost) all of your network traffic. Unlike other security mechanisms, Tcpcrypt works out of the box: it requires no configuration, no changes to applications, and your network connections will continue to work even if the remote end does not support Tcpcrypt, in which case connections will gracefully fall back to standard clear-text TCP.

Tcpcrypt - Encrypting the Internet

Keygrip is a node.js module for signing and verifying data (such as cookies or URLs) through a rotating credential system, in which new server keys can be added and old ones removed regularly, without invalidating client credentials.

keygrip - Key signing and verification for rotated credentials 

Simple encrypted web chat. Powered by socket.io, the web cryptography API. This project is an example of how client side encryption works and how you can integrate it as a chat service. Darkwire server is a Node.js application that requires redis. The Darkwire.io web client is written in JavaScript with React JS and Redux. It uses a combination of asymmetric encryption (RSA-OAEP), symmetric session keys (AES-CBC) and signing keys (HMAC) for security.

Darkwire.io -  End-to-end encrypted instant web chat

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sjcl - Stanford Javascript Crypto Library

OpenPGP.js - OpenPGP implementation for JavaScript

Cryptography - Package designed to expose cryptographic primitives and recipes to Python developers

BouncyCastle - Lightweight Cryptography API for Java and CSharp

Cryptomator - Multi-platform transparent client-side encryption of your files in the cloud

NaCL - Networking and Crytography library

Tink - Cryptographic library that provides an easy, secure, and agile API for common cryptographic tasks

Crypto-js - JavaScript library of crypto standards

Python-gnupg - Python API which wraps the GNU Privacy Guard

Cryptlib - provides Encryption and Authentication Service

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

SecureDrop - Whistleblower Submission System

Tcpcrypt - Encrypting the Internet

keygrip - Key signing and verification for rotated credentials

Darkwire.io - End-to-end encrypted instant web chat

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