Open Source C# Security Apps for Android

The Bitwarden mobile application is written in C# with Xamarin Android, Xamarin iOS, and Xamarin Forms. Manage, store, secure, and share unlimited passwords across unlimited devices from anywhere. Bitwarden delivers open-source password management solutions to everyone, whether at home, at work, or on the go. Generate strong, unique, and random passwords based on security requirements for every website you frequent. Bitwarden Send quickly transmits encrypted information, files and plaintext, directly to anyone. Passwords are protected with advanced end-to-end encryption (AES-256 bit, salted hashtag, and PBKDF2 SHA-256) so your data stays secure and private. Generate strong, unique, and random passwords based on security requirements for every website you frequent. Bitwarden translations exist in 40 languages and are growing, thanks to our global community.

An open source implementation of the FIDO2 protocol to support passwordless strong authentication using public-key cryptography. Supports registration, authentication (all platforms), and transaction authorization (for native Android apps).

The wolfSSL embedded SSL library (formerly CyaSSL) is a lightweight, portable, C-language-based SSL/TLS library targeted at IoT, embedded, and RTOS environments primarily because of its size, speed, and feature set. It works seamlessly in desktop, enterprise, and cloud environments as well. wolfSSL supports industry standards up to the current TLS 1.2 and DTLS 1.2, is up to 20 times smaller than OpenSSL, offers a simple API, an OpenSSL compatibility layer, OCSP and CRL support, is backed by the robust wolfCrypt cryptography library, and much more. wolfSSL relies on the FIPS 140-2 validated wolfCrypt library for all cryptographic functionality. Visit http://wolfssl.com/wolfSSL/fips.html for more info!

This project provides stable releases of Pkcs11Interop project hosted on github. Please visit project website - www.pkcs11interop.net - for more information.

PushSharp is a server-side library for sending Push Notifications to iOS/OSX (APNS), Android/Chrome (GCM/FCM), Windows/Windows Phone, Amazon (ADM) and Blackberry devices! PushSharp v3.0+ is a complete rewrite of the original library, aimed at taking advantage of things like async/await, HttpClient, and generally a better infrastructure using lessons learned from the old code. PushSharp will now follow semver versioning, so major version numbers will go up as there are any breaking API changes. The API in v3.x+ series is quite different from 2.x. The goal is to simplify things and focus on the core functionality of the library, leaving things like constructing valid payloads up to the developer. For APNS you will also need to occasionally check with the feedback service to see if there are any expired device tokens you should no longer send notifications to.

A fast and lightweight end to end encrypted Personal Information System. It has easy to use check-in/check-out functionality, tracks the history of every updates on each database entry, it supports secure attachments of digital files like images and audio/video, and most of all the database is secured by industry standard encryption technologies. Very intuitive and easy to use.

yaSSL, or yet another SSL, is an embedded ssl library for programmers building security functionality into their applications and devices. yaSSL is highly portable, and runs on standard as well as embedded platforms(QNX, ThreadX, VxWorks, Tron) yaSSL is still available but no longer being developed. Current development on the same project continues under wolfSSL. Visit yaSSL Home above for the latest stable release.