Showing 302 open source projects for "encryption"

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  • 1
    Telegram for Android

    Telegram for Android

    Telegram messenger for Android

    Telegram is a wonderful and private messaging app that offers simple, fast, secure and synced messaging for all your devices. It delivers messages faster than any other application; cloud-based so you can access your messages from any device; and very secure, with messages heavily encrypted and could even self-destruct. Telegram is simple and fun to use, with powerful photo and video editing tools as well as an open sticker/GIF platform to let you express yourself fully. It’s also...
    Downloads: 12 This Week
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  • 2
    Qpsmtpd

    Qpsmtpd

    qpsmtpd is a flexible smtpd daemon written in Perl

    qpsmtpd is a flexible SMTP daemon written in Perl, designed to be easily extensible through a plugin architecture. It serves as a drop-in replacement for qmail-smtpd and supports integration with various mail transfer agents, providing advanced spam filtering and email processing capabilities.
    Downloads: 0 This Week
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  • 3
    ble

    ble

    Connect to and interact with Bluetooth LE peripherals

    BLE is a NativeScript plugin for Bluetooth Low Energy (BLE) communication, enabling mobile apps to interact with Bluetooth devices. It supports connecting, reading, writing, and receiving notifications from BLE peripherals.
    Downloads: 0 This Week
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  • 4
    CryptPad
    CryptPad is an open-source, end-to-end encrypted collaborative office suite developed by XWiki SAS. It offers a privacy-focused alternative to mainstream cloud-based productivity tools, enabling users to create, edit, and share documents securely without compromising data privacy. All content is encrypted client-side, ensuring that only authorized users can access the information. CryptPad supports various applications, including rich text documents, spreadsheets, presentations, code...
    Downloads: 8 This Week
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    Bitchat

    Bitchat

    Bluetooth mesh chat, IRC vibes

    BitChat is a decentralized, peer-to-peer encrypted messaging app built by Jack Dorsey’s Permissionless Tech. It uses Bluetooth Low Energy mesh networking to relay messages without internet, servers, accounts, or phone numbers. Messages are end-to-end encrypted (Curve25519 + AES‑GCM) and the app includes a panic mode to erase data quickly.
    Downloads: 1 This Week
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  • 6
    Proton Mail Bridge

    Proton Mail Bridge

    Proton Mail Bridge application

    ...It provides a seamless integration layer for users who need offline support, familiar local client workflows, or tighter integration with desktop tools while preserving Proton’s zero-access encryption model. The Bridge app continues running even when its GUI is closed so that mail clients can remain connected and synchronized, and it supports automatic startup and robust credential handling via secure storage.
    Downloads: 7 This Week
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  • 7
    Trystero

    Trystero

    Serverless WebRTC matchmaking for painless P2P

    Serverless WebRTC matchmaking for painless P2P: make any site multiplayer in a few lines. Trystero manages a clandestine courier network that lets your application's users talk directly with one another, encrypted and without a server middleman. To establish a direct peer-to-peer connection with WebRTC, a signalling channel is needed to exchange peer information (SDP). Typically this involves running your own matchmaking server but Trystero abstracts this away for you and offers multiple...
    Downloads: 0 This Week
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  • 8
    GameNetworkingSockets

    GameNetworkingSockets

    Reliable & unreliable messages over UDP

    ...The basic idea is for the receiver to efficiently communicate to the sender the status of every packet number (whether or not a packet was received with that number). By remembering which segments were sent in each packet, the sender can deduce which segments need to be retransmitted. Encryption. AES-GCM-256 per packet, Curve25519 for key exchange and cert signatures. The details for shared key derivation and per-packet IV are based on the design used by Google's QUIC protocol. This library has shipped on consoles, mobile platforms, and non-Steam stores, and has been used to facilitate cross-platform connectivity. Contact us to get access to the code.
    Downloads: 2 This Week
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  • 9
    Signal Server

    Signal Server

    Server supporting the Signal Private Messenger applications on Android

    Signal Server is the official backend server component that supports the Signal Private Messenger ecosystem on Android, iOS, and desktop platforms, serving as the trusted message relay, contact discovery, and push notification hub while the clients handle end-to-end encryption. Built in Java and licensed under the AGPL-3.0 license, this server software handles protocols for delivering encrypted messages, synchronizing user metadata like public keys and push tokens, and providing REST and service APIs for the client apps to interact with. Although cryptographic operations and message confidentiality are managed by the client side using the Signal Protocol, the server ensures message routing, user registration, and group updates without having access to the decrypted contents. ...
    Downloads: 2 This Week
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  • 10
    Nextcloud Talk

    Nextcloud Talk

    Video- & audio-conferencing app for Nextcloud

    Nextcloud Talk is the official chat, video and audio conferencing app for Nextcloud that allows users to chat, call and screenshare with multiple other users. Nextcloud offers better protection for your communication as it provides end-to-end encryption and keeps even metadata from leaking. You can have private, group, public or password protected calls by simply inviting one person, a whole group, or sending a public link as an invitation to a call. It is also conveniently integrated with other Nextcloud apps like Files and Contacts, so you can share and edit documents, link with calendars, tasks and other resources while in a chat room.
    Downloads: 1 This Week
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  • 11
    Proton Web Clients

    Proton Web Clients

    Monorepo hosting the proton web clients

    ...These web clients run entirely in the browser, letting users securely interact with their email, calendars, files, and other services without needing native software installed, and benefiting from end-to-end encryption where applicable. The monorepo includes application logic, UI components, build scripts, and testing infrastructure for reliable deployments and streamlined continuous integration.
    Downloads: 1 This Week
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  • 12
    Status - a Mobile Ethereum OS

    Status - a Mobile Ethereum OS

    A free (libre) open source, mobile OS for Ethereum

    ...Only you hold the keys to your funds. Status' intuitive design protects you and your funds from attacks. Status uses an open-source, peer-to-peer protocol, and end-to-end encryption to protect your messages from third parties. Keep your private messages private with Status. Browse the growing ecosystem of DApps including marketplaces, exchanges, games, and social networks. The latest security standards ensure a private browsing experience. You will never be asked for a phone number, email address, or bank account when generating a Status account. ...
    Downloads: 1 This Week
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  • 13
    Synapse

    Synapse

    Matrix reference homeserver

    ...Eventually-consistent cryptographically secure synchronization of room state across a global open network of federated servers and services. Send and receive extensible messages in a room with (optional) end-to-end encryption. Use 3rd Party IDs (3PIDs) such as email addresses, phone numbers, Facebook accounts to authenticate, identify and discover users on Matrix.
    Downloads: 1 This Week
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  • 14
    CIM

    CIM

    Distributed instant messaging system for developers

    ...The server automatically removes offline clients. Client reconnects automatically. You can use Google Protocol Bufferefficient codec. Its protocol supports message encryption. Store routing information, account information, online status, etc. of each client. Message routing server; used to process message routing, message forwarding, user login, user offline, and some operational tools (obtaining the number of online users, etc.).
    Downloads: 0 This Week
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  • 15
    Addy

    Addy

    Anonymous email forwarding

    Addy is an open-source anonymous email forwarding service designed to protect users’ real email addresses from exposure, spam, and tracking by letting them create and manage unlimited email aliases that forward to their primary inbox. Instead of giving out their real email address when signing up for services, users can create descriptive or random alias addresses that disguise their identity and keep their inbox clean by deactivating or deleting any alias that starts receiving unwanted...
    Downloads: 0 This Week
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  • 16
    libsignal

    libsignal

    Home to the Signal Protocol and other cryptographic primitives

    libsignal is the foundational cryptographic library that implements the Signal Protocol and other essential primitives used across the official Signal clients and servers, enabling secure end-to-end encrypted communication. Written primarily in Rust with bindings and APIs surfaced for Java, Swift, and TypeScript, this library encapsulates critical algorithms like the Double Ratchet, prekey mechanisms, secure key storage, and zero-knowledge group primitives, along with additional utilities...
    Downloads: 0 This Week
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  • 17
    Carmine

    Carmine

    Redis client and message queue for Clojure

    ...Flexible, high-performance binary-safe serialization using Nippy. Simple, high-performance message queue (v2+, Redis 2.6+). Simple, high-performance distributed lock (v2+, Redis 2.6+). Pluggable compression and encryption support (v2+). Includes Tundra, an API for replicating data to an additional datastore (v2+, Redis 2.6+). You'll usually want to define a single connection pool, and one connection spec for each of your Redis servers. Note that executing multiple Redis commands in a single wcar request uses efficient Redis pipelining under the hood, and returns a pipeline reply (vector) for easy destructuring, etc.
    Downloads: 0 This Week
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  • 18
    status-react

    status-react

    A free (libre) open source, mobile OS for Ethereum

    ...Only you hold the keys to your funds. Status' intuitive design protects you and your funds from attacks. Status uses an open-source, peer-to-peer protocol, and end-to-end encryption to protect your messages from third parties.
    Downloads: 0 This Week
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  • 19
    SparkleShare

    SparkleShare

    Share and collaborate by syncing with any Git repository

    SparkleShare creates a special folder on your computer. You can add remotely hosted folders (or "projects") to this folder. These projects will be automatically kept in sync with both the host and all of your peers when someone adds, removes or edits a file. SparkleShare was made to cover certain use cases, but doesn't handle every scenario well. SparkleShare uses the version control system Git under the hood, so setting up a host yourself is relatively easy. Using your own host gives you...
    Downloads: 0 This Week
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  • 20
    qBittorrent

    qBittorrent

    A free and reliable P2P BitTorrent client

    An advanced and multi-platform BitTorrent client with a nice Qt user interface as well as a Web UI for remote control and an integrated search engine. qBittorrent aims to meet the needs of most users while using as little CPU and memory as possible.
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    Downloads: 1,055,179 This Week
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  • 21

    Ciphero

    Secure communication software

    Securely cipher your message or file, share it, safely de-cipher it.
    Downloads: 0 This Week
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  • 22
    mendelson AS2

    mendelson AS2

    Implementation of the EDIINT AS2 protocol (RFC 4130)

    mendelson AS2 is the JAVA-based open source EDIINT AS2 solution. Monitoring- and configuration GUI, async & sync MDN, signatures, encryption, TLS, web interface, pluggable into any servlet container, partner manager, certificate manager, data compression, optional profiles: MA, FN. Localized to Spanish, Italian, Portuguese, German, English, French, Polish
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    Downloads: 186 This Week
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  • 23
    mendelson OFTP2

    mendelson OFTP2

    Implementation of the OFTP2 protocol (RFC 5024)

    The mendelson OFTP2 is a JAVA-based open source OFTP2 solution. It contains a logging- and configuration UI and supports encryption, digital signatures, message compression, TLS, certificate exchange, message routing, mail notification
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    Downloads: 49 This Week
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  • 24
    BeeBEEP (Free Office Messenger)

    BeeBEEP (Free Office Messenger)

    You can message and share files inside your intranet without a server.

    BeeBEEP is a free, open-source, peer-to-peer (P2P) desktop LAN chat and office messenger built with end-to-end encryption (Rijndael Algorithm, AES). Designed for local area networks, this free cross-platform messaging app enables instant messaging, group chat, and secure file sharing across your office, home, or intranet—completely serverless and offline. Whether you need a private LAN chat application for your team or a secure office communicator over VPN, BeeBEEP operates without central servers or cloud dependencies. ...
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    Downloads: 3,209 This Week
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  • 25
    SyntroSend

    SyntroSend

    Secure P2P file transfer app for Windows, Mac, Linux & Android

    ...Built on modern P2P networking technology, SyntroSend allows users to transfer files locally over the same WiFi network or globally through encrypted tunnels. There are no file size limits, no account requirements, and no data stored on external servers. Key features include end-to-end encryption, secure transfer codes, automatic resume for interrupted transfers, and file integrity verification. Users can easily select files or folders, generate a secure code, and share it with others to start instant transfers. SyntroSend is designed for simplicity, performance, and complete control over your data across all major platforms.
    Downloads: 4 This Week
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