Security & Privacy Software for Linux
Ricochet
Ricochet is a communications application that uses the Tor network to reach your contacts without relying on messaging servers. It creates a hidden service, which is used to rendezvous with your contacts without revealing your location or IP address. Instead of a username, you get a unique address that looks like ricochet:rs7ce36jsj24ogfw.
VeraCrypt
VeraCrypt is free and open-source disk encryption software. The software is a fork of TrueCrypt 7.1a with enehanced security to the algorithms used for system and partitions encryption making it immune to new developments in brute-force attacks. VeraCrypt is available for Windows, MacOS and Linux.
1Password
1Password is a password manager that provides an easy way to store and use strong passwords. With 1Password you can log in to sites and fill forms securely with a single click. More than 70,000 businesses trust 1Password to secure their business and protect their data.
ZeroTier
ZeroTier is a global area network provider that enable the creation of secure networks between on-premise, cloud, desktop, and mobile devices. Allowing you to securely connect to any device, anywhere. ZeroTier combines the capabilities of VPN and SD-WAN to simplify network management, allowing organization to connect team members securely withing a decentralized workforce.
Keybase
With Keybase you can communicate with friends and co-worker and store your group’s photos, videos, and documents with end-to-end encryption. Keybase is a free and open-source security app for mobile phones and computers.
Gnome Authenticator
Gnome Authenticator is a GNOME-based two factor authentication application built for Linux-based operating systems for both mobile and desktop.
Replicant
Replicant is a fully free and open source Android distribution designed for freedom, privacy and security. Replicant replaces all proprietary Android components with free and open counterparts allowing you to be in control of your operating system, its software and your personal information and data.
Openswan
Openswan has been a popular VPN alternative for Linux users since2005. It is an IPsec implementation with support for most of its extensions (RFC and IETF drafts), even IKEv2, NAT Traversal, X.509 Digital Certificates and more. Openswan comes packages with various Linux distributions, including Gentoo, Fedora, Ubuntu, Red Hat and others.
ReverseSSH
ReverseSSH is a statically-linked ssh server with a reverse connection feature for simple yet powerful remote access. Most people find ReverseSSH useful during HackTheBox, CTF's and similar challenges.
Signal
Signal is a cross-platform encrypted messaging application that has a strong focus on privacy. The application is developed by Signal Messenger LLC and provides users with features like one-to-one and group messages, which can include files, voice notes, images and videos. The software is famous for being used by the whistleblower and privacy advocate Edward Snowden who once said "I use Signal every day, it is the most scalable encryption tool we have".