end-to-end - End-To-End is a crypto library to encrypt, decrypt, digital sign, and verify signed messages (implementing OpenPGP and OTR)

---

End-To-End is a crypto library to encrypt, decrypt, digital sign, and verify signed messages (implementing OpenPGP and OTR).This is the source code for the End-To-End library. It's built upon a newly developed, JavaScript-based crypto library. End-To-End implements the OpenPGP standard, IETF RFC 4880, enabling key generation, encryption, decryption, digital signature, and signature verification.

openpgp otr cryptography

Charm-crypto - A Python-based rapid prototyping framework for cryptosystems

---

Charm is a framework for rapidly prototyping advanced cryptosystems. Based on the Python language, it was designed from the ground up to minimize development time and code complexity while promoting the reuse of components. It supports Base crypto library, including symmetric encryption schemes, hash functions, PRNGs, digital signature, encryption and lot more.

cryptography toolkit encryption digital-signature crypto

OpenCA - PKI Management Software

---

The OpenCA PKI Development Project is a collaborative effort to develop a robust, full-featured and Open Source out-of-the-box Certification Authority implementing the most used protocols with full-strength cryptography world-wide. The project development is divided in two main tasks: studying and refining the security scheme that guarantees the best model to be used in a CA and developing software to easily setup and manage a Certification Authority.

certificate-authority certificate pki cryptography digital-signature security

minisign - A dead simple tool to sign files and verify digital signatures.

---

Minisign is a dead simple tool to sign files and verify signatures. Minisign uses the EdDSA signature system, and deterministic signature schemes are fragile against fault attacks. However, conducting these requires physical access or the attacker having access to the same physical host.

cryptography crypto signatures ed25519 pgp gpg

python-ecdsa - pure-python ECDSA signature/verification

---

This is an easy-to-use implementation of ECDSA cryptography (Elliptic Curve Digital Signature Algorithm), implemented purely in Python, released under the MIT license. With this library, you can quickly create keypairs (signing key and verifying key), sign messages, and verify the signatures. The keys and signatures are very short, making them easy to handle and incorporate into other protocols. This library provides key generation, signing, and verifying, for five popular NIST "Suite B" GF(p) curves, with key lengths of 192, 224, 256, 384, and 521 bits. The "short names" for these curves, as known by the OpenSSL tool (openssl ecparam -list_curves), are: prime192v1, secp224r1, prime256v1, secp384r1, and secp521r1. It also includes the 256-bit curve used by Bitcoin, whose short name is secp256k1. No other curves are included, but it would not be too hard to add more.

Assinador Digital (Digital Signature Utility)

---

Com poucos cliques e de modo simples e fácil, esta aplicação realiza processos de visualização, inclusão, remoção e validação de assinaturas digitais em lotes de documentos que utilizam a Open Packaging Convention (OPC).

assinatura-digital certificado-digital digital-certificate digital-signature

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

---

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.

cryptography encryption pkcs hash digital-signature

Cryptlib - provides Encryption and Authentication Service

---

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.

cryptography encryption s-mime digital-signature security security-library

Gpg4win - GnuPG for Windows

---

Gpg4win (GNU Privacy Guard for Windows) is encryption software for files and emails. Gpg4win supports both relevant cryptography standards, OpenPGP and S/MIME (X.509), and is the official GnuPG distribution for Windows. It is maintained by the developers of GnuPG.

gnupg security encryption digital-signature security-library

XML Security Library

---

XML Security Library is a C library based on LibXML2.

xml-security digital-signature encryption security library

j4sign

---

This project is devoted to provide a simple software layer for digital signature, when an hardware cryptographic token is required. The default implementation tries to comply as strictly as possible with the italian law digital signature directives.

Apache Santuario - Library implementing XML Digital Signature Specification & XML Encryption Specifi

---

Library implementing XML Digital Signature Specification & XML Encryption Specification

jsrsasign - The 'jsrsasign' (RSA-Sign JavaScript Library) is an opensource free cryptography library supporting RSA/RSAPSS/ECDSA/DSA signing/validation, ASN

---

The 'jsrsasign' (RSA-Sign JavaScript Library) is an opensource free cryptography library supporting RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp, CAdES JSON Web Signature/Token/Key in pure JavaScript.Public page is http://kjur.github.com/jsrsasign .

jwt-token-library jwt-token jwt-library jwt json-web-token

CryptonCmd is cryptography toolset for encrypting and digital signing

---

CryptonCmd is simple toolset for basic cryptographic operations. It developed using C# 4.0 and VS2010. CryptonCmd includes command line utilites for encrypting, decrypting, signing, sign verification and cryptographic keys generation. Both symmetric and asymmetric algorithms a...

asymmetric cryptographic cryptography cryptoncmd decryption des encryption

DocuSign in SharePoint 2007

---

DocuSign eSignature services support esigning from within the SharePoint environment. Has a number of integration points into your business. Try this sample.

digital-signature docusign electronic-signature esign esign-in-sharepoint moss-2007

Digital Wallet

---

e-Wallet is a WPF application that allows you to store sensitive information such as online banking accounts or user names and passwords, and protect all of that information securely with a single password or a digital certificate.

cryptography encryption security storage x509-certificates

TCPDF - PHP class for generating PDF

---

TCPDF is a PHP class for generating PDF documents without requiring external extensions. TCPDF Supports UTF-8, Unicode, RTL languages, XHTML, Javascript, digital signatures, barcodes and much more.

text-extraction pdf pdf-library pdf-text-extraction

OpenSC - Open source smart card tools and middleware. PKCS#11/MiniDriver/Tokend

---

OpenSC provides a set of libraries and utilities to work with smart cards. Its main focus is on cards that support cryptographic operations and facilitate their use in security applications such as authentication, mail encryption and digital signatures. OpenSC implements the PKCS11 API so applications supporting this API (such as Mozilla Firefox and Thunderbird) can use it. On the card OpenSC implements the PKCS15 standard and aims to be compatible with every software/card that supports it.

smart-card middleware security authentication digital-signature

tweetnacl-js - Port of TweetNaCl cryptographic library to JavaScript

---

Port of TweetNaCl / NaCl to JavaScript for modern browsers and Node.js. Public domain.The primary goal of this project is to produce a translation of TweetNaCl to JavaScript which is as close as possible to the original C implementation, plus a thin layer of idiomatic high-level API on top of it.

crypto authentication signature elliptic-curves secretbox djb salsa20 curve25519 eddsa sha-512 tweetnacl nacl libsodium ed25519 cryptography encrypt hash key poly1305 public signatures

bitauth - Authenticate with web services utilizing the same strategy as Bitcoin.

---

BitAuth is a way to do secure, passwordless authentication using the cryptography in Bitcoin. Instead of using a shared secret, the client signs each request using a private key and the server checks to make sure the signature is valid and matches the public key.BitAuth uses the same technology in Bitcoin. A public private key pair is created using elliptic curve secp256k1. The public SIN (System identification number), like a bitcoin address, is the RIPEMD 160, SHA256 hash of the public key. See https://en.bitcoin.it/wiki/Identity_protocol_v1 for complete details.