A web application that sits in front of a command line Signal client that lets you send messages from a web browser. Seems to also have a REST API. Requires a second phone number to set up an account, it's not an extension to an existing Signal setup. Looks like all-Docker-all-the-time but it looks like you can also run it as a system service (a systemd .service file is in the docs, and it says nothing about using Docker for that).
Interestingly, it's a couple of shell scripts.
Our mission is to promote new technologies, protect privacy and protection of human rights. When you yourself encrypt your messages and using jabber, we can not know what you're talking about.
Daniel J. Berstein's homepage. There are tools and code galore here - check it out!
A utility which can be used to recover the passphrase for a PGP or GnuPG key.
Off-the-Record (OTR) Messaging allows you to have private conversations over instant messaging by providing encryption, authentication, deniability and perfect forward secrecy.
An open-source utility for Linux that uses an attached webcam to seed the kernel's random number generator for cryptographic purposes.
An open source utility for Linux that seeds the kernel's random number generator with data pulled from an attached microphone.
The full text of The Handbook of Applied Cryptography, one of the best textbooks available in the field. The original authors have gotten permission from the publisher to put the text online as sets of PostScript and .pdf files for anyone to download and share.
A bundle of open source cryptographic software for Microsoft Windows with an installer to make it simple to set up. Includes GnuPG, WinPT and GPA (keyring managers), GPGol (a plugin for Outlook 2003), GPGee (a plugin for the Windows Explorer), and a copy of Claws (an e-mail client that uses GnuPG transparently). Also includes handbooks for newbies with crypto.
An application which makes it easier to tunnel IP traffic through the Tor darknet. Stand-alone application. The OS you run this on must have support for IPv6 enabled, though OnionCat can be configured to use IPv4 as well. Gives hidden services IPv6 addresses to make them easier to connect to. Also makes it possible to provide hidden services as easily as one can provide public services on the Net, such as SMTP, DNS, and even VPN.
A system for allowing the reboot of servers with encrypted hard drives when you arent physically present to type in the passphrases. It relies upon strictly timed encrypted network communications with trusted systems and the use of PGP to decrypt some of the keying material.
A public keyserver for GnuPG and PGP public keys. Submit your key so people can look it up, or search it for keys that you might not have.