GCHQ Home page. GCHQ.gov.uk, archiviert vom Original am 1. August 2014; abgerufen am 7. März 2014 (englisch).
nytimes.com
archive.nytimes.com
British Document Outlines Early Encryption Discovery. In: archive.nytimes.com. Abgerufen am 12. Mai 2021 (englisch): „The set of algorithms, equations and arcane mathematics that make up public key cryptography are a crucial technology for preserving computer privacy in and making commerce possible on the Internet. Some hail its discovery as one of the most important accomplishments of 20th-century mathematics because it allows two people to set up a secure phone call without meeting beforehand. Without it, there would be no privacy in cyberspace.“