1. PGP Message Exchange Formats
2. T. Berson . 2018 . Phone interview conducted by Hilarie Orman , March 29, 2018. T. Berson. 2018. Phone interview conducted by Hilarie Orman, March 29, 2018.
3. Who holds the keys?
4. The first ten years of public-key cryptography
5. W. Diffie. 1992. Interview at Karlsruher Institut fur Technologie. http://www.itas.kit.edu/pub/m/2002/wedi02a.htm. Retrieved March 9 2022 from https://web.archive.org/web/20000414233003/www.cesg.gov.uk/about/nsecret.htm. W. Diffie. 1992. Interview at Karlsruher Institut fur Technologie. http://www.itas.kit.edu/pub/m/2002/wedi02a.htm. Retrieved March 9 2022 from https://web.archive.org/web/20000414233003/www.cesg.gov.uk/about/nsecret.htm.