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Yubikey Full Disk Encryption is an open source Linux, macOS, or Unix resource with code, tools, or setup notes.
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github.com
Cryptomator is an open-source project offering multi-platform transparent client-side encryption of files in the cloud. It works with Dropbox, Google Drive, OneDrive, MEGA, pCloud, ownCloud, Nextcloud and any other cloud storage service which synchronizes with a local directory, using AES encryption with 256-bit key length. File names are encrypted and folder structure is obfuscated.
dino.im
Dino is an open-source chat client for the desktop built on the XMPP protocol. It offers a clean interface with encryption; end-to-end encryption via OMEMO or OpenPGP can be enabled, and read and typing notifications can be disabled. Dino is developed on GitHub by an open community and is available from repositories of many Linux distributions.
nuetzlich.net
gocryptfs is a free file-based encryption tool implemented as a mountable FUSE filesystem, storing each file as one corresponding encrypted file on disk. Encrypted files can be kept in any folder, a USB stick or Dropbox, and file-based encryption allows efficient synchronisation with tools like rsync. Linux is fully supported and macOS support is beta quality.
internxt.com
Internxt is a cloud storage service that encrypts files before they leave the user's device using zero-knowledge AES-256 encryption. The code is published on GitHub for independent review. A free plan offers 1 GB of encrypted storage, and paid plans are advertised starting at €9.99 per month. Apps are offered for Linux, Windows, macOS, iOS, Android and the web.
nordlocker.com
File vault and cloud storage with end-to-end encryption and a zero-knowledge design for syncing private files across supported devices.
openpgp.org
A page listing email applications across Windows, macOS, Android, iOS, Linux, browser plugins and webmail providers that support the OpenPGP standard, either directly or with additional software. The page states that its authors do not actively participate in developing these third-party apps and have not performed security audits.
pdfencrypt.net
PDFEncrypt is a free, open-source native Windows app that encrypts PDF files using standard PDF encryption algorithms. Users specify a password required to open the document along with options and permissions for the PDF. Encryption runs locally on the Windows PC rather than uploading files to a third-party server. The app uses the iTextPDF library and is released under the AGPL license.
canihavesomecoffee.github.io
A browser-based tool that calculates primes, encrypts messages with the RSA algorithm and brute-forces decryption of RSA messages given a public key. All primes between 0 and 0 are stored in JavaScript files, and additional primes can be generated and kept until the page reloads.
unenc.com
Universal Encoding Tool is a web-based utility that offers methods for encoding, decoding, encryption, decryption, conversion and hashing. It covers simple conversions between ASCII, binary, hex, decimal and Roman numerals, along with network tools for IP and IPv6. Non-key encoding methods, HTML entities, URL encoding, hash algorithms, key-based encryption ciphers, Unix time conversion and IBAN validation are also listed.
win-rar.com
WinRAR is a Windows data compression, encryption and archiving tool that opens RAR and ZIP files and supports other file formats. It can compress, encrypt, package and backup with one utility, split archives into separate volumes, and use AES 256-bit encryption. It is a trial product that can be used free of charge for 40 days.
github.com
Wormhole Crypto is a package providing streaming encryption for Wormhole.app, based on Encrypted Content-Encoding for HTTP (RFC 8188). It is used by Wormhole.app and offered under the MIT license. It provides a Keychain class for creating encryption and decryption streams and for encrypting or decrypting metadata buffers.
adium.im
Adium is a free, open-source instant messaging application for macOS that connects to XMPP (Jabber), IRC and other services. It is a third-party client based on the libpurple protocol library, with tabbed chat windows, themeable message views, macOS Contacts integration and OTR encryption. It is developed by volunteers and released under the GNU GPL.
chezmoi.io
chezmoi manages personal configuration files, known as dotfiles, across multiple machines. It provides templates, password manager support, importing files from archives, full file encryption, and script running. It runs on all popular operating systems as a single statically-linked binary with no dependencies and does not require root access.
pgp.mit.edu
The MIT PGP Key Server is also named the MIT PGP Public Key Server. It provides options to extract a key, submit a key, and remove a key. The site also lists help topics for extracting keys, submitting keys, an email interface, information about the server, a FAQ, and related information about PGP. The page includes links for these actions and resources.
proton.me
Proton Docs is a secure online document collaboration tool offered by Proton. It supports real-time co-authoring, safe document sharing, cross-device access, and end-to-end encryption. The tool also includes features for tracking changes and suggestions, gathering feedback and comments, and user-controlled sharing.
proton.me
Proton Mail is a secure email service operated by Proton, based in Switzerland and protected by Swiss privacy law. It is the world's largest secure email service, with over 100 million users, and offers end-to-end and zero-access encryption for all messages. The service is ad-free, available on web, iOS, Android, and desktop platforms, supports importing existing messages and contacts, and offers both personal and business plan options.
signal.org
Signal is a messaging application focused on privacy. Its source page describes end-to-end encryption via the open source Signal Protocol, and support for text, voice messages, photos, videos, GIFs, files, voice and video calls and group chats. It is described as free, with no ads or trackers, and as an independent nonprofit.
github.com
) - CLI agent runner - create AI agents that discover each other via Nostr (NIP-89, NIP-90, NIP-44 v2 encryption for targeted jobs), accept jobs, and get paid on-chain.
actualbudget.org
Actual Budget is a local-first personal finance app built around envelope budgeting. It supports syncing across devices with optional end-to-end encryption, and offers bank sync through goCardless in the EU/UK and SimpleFIN in the US/Canada.
addy.io
addy.io is an open-source anonymous email forwarding service. It creates email aliases that forward to a real inbox, letting users give each website a different address and deactivate aliases that begin receiving spam. The service offers mobile apps, a browser extension and GPG/OpenPGP encryption.
github.com
age is a file encryption tool, format and Go library with small explicit keys, post-quantum support, no config options, and UNIX-style composability. It provides an age-keygen command for generating keys and can encrypt or decrypt files, including piping data through it. Install packages are listed for several systems, and plugins such as age-plugin-yubikey support hardware tokens.
mail.aionda.com
Aionda Mail is a German groupware service offering email, calendar and contacts, end-to-end encrypted with post-quantum cryptography. Accounts can create unlimited addresses, and an AI assistant is enabled by default on the provider's own servers and can be turned off. Zero-knowledge encryption is described. A Plus plan lists an encrypted mailbox, unlimited addresses and custom domains.
airexplorer.net
Air Explorer is a cloud manager for Windows and Mac that transfers, syncs and encrypts files across 40+ services. It offers cloud-to-cloud transfers, scheduled sync and backups, file encryption and a unified interface for managing multiple accounts. A Pro version and a command line for automation are also documented.