You can send a PGP-encrypted email to ryan [at] rjgallagher.co.uk using this public key:
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[Fingerprint: 1818 A67A CE48 F9A6 769B 2FA9 8E9D DDC9 16C0 4FB2]
Alternatively:
• Signal or WhatsApp: You can contact Ryan using either of the smartphone apps Signal or WhatsApp for encrypted communication. Ryan's number for this purpose is: +44 737-678-6842
• Off the record: If you use secure instant message programs like Pidgin (Windows) or Adium (Mac) you can reach Ryan for an 'off the record' encrypted chat by adding: ryan.gallagher [at] jabber.org [Fingerprint: 9611F5BB 1D6A83BC 4155FE2A 7854B221 07B207FD]
• SecureDrop: Documents or messages can be sent to Ryan via The Intercept's SecureDrop submission system, which offers a much higher level of security than any of the above methods.
Note: If you are new to encryption and/or don't understand how to use it, there are good guides online that can be used to help set you up with the basics, such as this one. If you are a source whose safety or security could be compromised by exposure, please don't take unnecessary risks. Ensure that you protect your communications with encryption and mask your identity with anonymity before reaching out.