• Always keep the private key secret. When you want to communicate with someone you share your public key. Messages are encrypted with the public key of the recipient by the sender and decrypted by the recipient with their private key when the message arrives. 221 • GPG4Win is an example of software that performs with PKE. 222 • It is also recommended to use privacy-focused email hosts such as Mozilla Thunderbird or RiseUp.net to protect personal information.223 Regarding online activity, consider the following issues: • For anonymity, use anonymous surfing modes to prevent your browser from saving your information automatically. However, be aware that using these anonymity modes will not make you completely anonymous. • Alternatively, use the software TOR as an accessible, free, and easy means to protect your privacy and anonymity. The main component of the software is the Tor web browser. This hardened and secured-focused version of Firefox encrypts your online activity and bounces it through computers around the world, making it more difficult to trace. • In addition, for confidentiality, to ensure that outsiders do not gather information about you when browsing online, use a virtual private network (VPN) to appear to be someone else, in a different place. A VPN secures the traffic between your computer and servers, and masks your IP address and location. Several VPNs are available, ranging from the free and simple HotspotShield to highend subscription services like SurfEasy Total. • Use a program like CCleaner to regularly remove all the information, passwords, files, and downloads that your web browser saves. As with securing electronic documents, the online platform Security in-a-box has developed a guide on safe and private online communication. 221 Dmitri Vitaliev, Digital Security and Privacy for Human Rights Defenders, FRONT LINE, 38 (Feb. 2007), available at http://www.frontlinedefenders.org/files/en/esecman.en_.pdf. 222 One can download the program from http://www.gpg4win.org. 223 Andy Greenberg, How to Anonymize Everything You Do Online (Jun. 17, 2014), available at http://www.wired.com/2014/06/be-anonymous-online/. 133

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