App Store
Avoid
Amazon Appstore
Google Play
Disk Encryption
Notes

2014-05-28: TrueCrypt currently has security issues and is not recommended.

If you’re running GNU/Linux, dm-crypt with LUKS is the recommended encryption option.

Gentoo GNU/Linux maintains a guide for dm-crypt with LUKS.

Arch GNU/Linux maintains a guide to dm-crypt with LUKS. Also useable for Parabola GNU/Linux.

Slackware Linux maintains a guide to dm-crypt with LUKS.

Transparency in this context means that individual programs don't need to manage encryption of their own data, because this is provided equally for all programs by the encryption tool (like dm-crypt). More details on this in the Wikipedia.

Avoid
BitLocker
FileVault
Symantec Drive Encryption
DNS
Notes

Google Public DNS permanently logs your ISP and location information for analysis. Your IP address is also stored for 24 hours.

OpenNIC has not adopted an official policy concerning log query privacy/anonymization. More information here.

Avoid
Google Public DNS
OpenDNS
Email
Notes

For more email providers, take a look at Privacy-Conscious Email Services. Please decide for yourself whether if you trust them with your data. For more discussion about safe email providers, please see issue #461.

MyKolab is hosted in Switzerland and benefits from the strong Swiss privacy laws. It is run exclusively with free software and using the service supports the development of Kolab. Also, it lets you export all your data at any time.

Riseup’s services may also be accessed via their Tor Hidden Service addresses. A list is available here.

Why not Hushmail? See 'compromises to email privacy'.

If you have the technical aptitude, consider running your own mail server.

Avoid
Apple Mail
eM Client
Gmail
GroupWise
IBM Notes
Microsoft Exchange
Microsoft Outlook
The Bat!
Yahoo! Mail
Yandex.Mail
Email Addons
Notes

“Pretty Good Privacy (PGP) is a data encryption and decryption computer program that provides cryptographic privacy and authentication for data communication. PGP is often used for signing, encrypting and decrypting texts, e-mails, files, directories and whole disk partitions to increase the security of e-mail communications.”

PRISM Break does not recommended S/MIME email encryption because of its reliance on third-party certificates from central authorities. Read more here.

OpenKeychain together with K-9 Mail provides end-to-end email encryption. An experimental project is GnuPG for Android by the Guardian Project.

Read the Email Self-Defense guide by the Free Software Foundation to learn how to encrypt your email messages.

Avoid
Enterprise Suite
Notes
The enterprise suite category is for solutions for organizations that cover more than 10 categories in an integrated fashion (ex.: logins work throughout all apps, etc.)
Avoid
G Suite
Office 365
Zoho Office Suite
Firmware
Notes
libreCMC is an FSF-endorsed derivation of OpenWrt with the proprietary blobs removed. If your device is supported by libreCMC, definitely use it over OpenWrt.
Avoid
Instant Messaging
Notes

“Off-the-Record Messaging, commonly referred to as OTR, is a cryptographic protocol that provides strong encryption for instant messaging conversations. OTR uses a combination of the AES symmetric-key algorithm, the Diffie–Hellman key exchange, and the SHA-1 hash function. In addition to authentication and encryption, OTR provides perfect forward secrecy and malleable encryption.

The primary motivation behind the protocol was providing deniability for the conversation participants while keeping conversations confidential, like a private conversation in real life, or off the record in journalism sourcing.”

The Guardian Project hosts a fantastic how-to guide to chatting securely on Android with ChatSecure.

Threema is not recommend by PRISM Break as it is closed source software. Freely available source code is a necessary condition for privacy and security.

Avoid
Discord
Facebook Messenger
Google Hangouts
ICQ
iMessage
LINE
Skype
Snapchat
Tencent QQ
Trillian
Viber Messenger
WeChat
WhatsApp
Mesh Networks
Notes

A mesh network is a decentralized peer-to-peer network, with user-controlled physical links that are usually wireless.

“Mesh networking (topology) is a type of networking where each node must not only capture and disseminate its own data, but also serve as a relay for other nodes, that is, it must collaborate to propagate the data in the network.”

Avoid
Operating Systems
Notes

Apple, Google, and Microsoft are allegedly a part of PRISM. Their proprietary operating systems cannot be trusted to safeguard your personal information from the NSA. We have two free alternatives: GNU/Linux and BSD.

GNU/Linux has a much larger community to help you with the transition. It’s recommended that you begin your explorations by looking for a GNU/Linux distribution that suits your needs. Additionally the Free Software Foundation hosts a list of completely Free distributions.

Debian has a long tradition of software freedom. Contributors have to sign a social contract and adhere to the ethical manifesto. Strict inclusion guidelines make sure that only certified open source software gets packaged in the main repositories.

Fedora is a community edition that serve as the stable basis for enterprise ready GNU/Linux distributions with commercial support. Companies all over the world trust Red Hat Inc. because of their transparency throughout the whole development process.

Canonical’s Ubuntu is not recommended by PRISM Break because it contains Amazon ads and data leaks by default. GNU/Linux distributions based on Ubuntu are also currently not recommended due to several other reasons.

Avoid
macOS
Windows
Operating Systems (Live)
Notes

A live distribution like Tails is the fastest and easiest way to a secure operating system. All you have to do is create a bootable CD or USB drive with the files provided and you’re set. Everything else will be preconfigured for you.

A virtual machine (VM) image like Whonix is designed to be run inside of a virtualization package like VirtualBox. VirtualBox can be installed on Windows, Linux, macOS, and Solaris. This means that if you're stuck using Windows or macOS for whatever reason, you can install VirtualBox and use Whonix to increase your privacy and security.

Avoid
Operating Systems (Mobile)
Notes

iOS and WP are proprietary operating systems whose source code are not available for auditing by third parties. You should entrust neither your communications nor your data to a black box device.

Avoid
BlackBerry 10
iOS
Productivity
Avoid
Doodle
Evernote
Google Docs
GroupWise
iWork
Microsoft Outlook
Zoho Docs
Social Networks
Notes

If you have system administration knowledge, please strongly consider running an instance of pump.io (or something else) for your friends, family, or favorite community. Many of them would be willing and grateful to escape Facebook if you provide them a way out.

For those of you without your own server, RetroShare is the easiest way to start your own encrypted social network.

Avoid
Facebook
Google+
LinkedIn
Snapchat
Twitter
Web Browser Addons
Notes

Installing your own add-ons into Tor Browser is not recommended, as they may bypass Tor or otherwise harm your anonymity and privacy. Check the EFF's Panopticlick to see how trackable your browser configuration is by third parties.

If you're using a Firefox-based browser, you can safeguard your browsing habits and stop advertising companies from tracking you by installing uBlock Origin, Request Policy, and HTTPS Everywhere.

A more advanced alternative to Request Policy would be uMatrix.

Install NoScript and enable ‘Forbid scripts globally’ to improve the security of your browser by preventing 0day JavaScript attacks. This is a drastic option as it will render many websites unusable as they rely heavily on JavaScript. NoScript offers a whitelist you can use to selectively enable JavaScript for sites you trust, but this is considered especially bad for your anonymity if you're using NoScript with Tor Browser.

Why is Adblock Plus not recommended? Adblock Plus shows “acceptable ads” by default, which works against the purpose of the add-on. Either disable acceptable ads or use uBlock Origin instead.

Avoid
Ghostery
Web Browsers
Notes

Try to use Tor Browser for all of your web surfing. It will offer you far better anonymity than any other browser. Make sure to learn the basics of Tor before using it. If the site you want to visit will not work in Tor Browser, try Firefox intead, but realize these browsers do not anonymize your ip by default.

Tor Browser notes: Using Tor Browser to sign into websites that contain your real ID is counterproductive, and may trip the site's fraud protection. Make sure to check for HTTPS before signing in to a website through Tor. Signing into HTTP websites can result in your ID being captured by a Tor exit node.

Firefox notes: This browser uses Google search by default: replace it with a more private alternative. Iceweasel is a rebranded version of Firefox that does not have to follow Mozilla Trademark Policy.

Why are Chromium, SRWare Iron, et al. not recommended on PRISM Break? More info here.

Warning for mobile devices & Tor: Websites using HTML5 <video> tags will leak <video>-related DNS queries and data transfer outside of Tor.

Avoid
Google Chrome
Microsoft Edge
Opera
Safari
Yandex.Browser
Notes

DuckDuckGo is a software-as-a-service (SaaS) hosted around the world that provides you with anonymous search results from these sources. DDG open source components are available here.

There is also a DuckDuckGo hidden service at 3g2upl4pq6kufc4m.onion for Tor users.

MetaGer is a SaaS by the German non-profit SUMA e.V. that provides you with anonymous meta search results.

Startpage is a SaaS hosted in the USA and the Netherlands that provides you with anonymous Google search and image results through a free proxy.

Avoid
Google Search
Microsoft Bing
Yahoo Search
Yandex Search