Bellovin, Steve (23 June 2009). "Security through obscurity". RISKS Digest. 25 (71). Archived from the original on 10 June 2011. Retrieved 18 September 2010.
Kerckhoffs, Auguste (January 1883). "La cryptographie militaire" [Military cryptography] (PDF). Journal des sciences militaires [Military Science Journal] (in French). IX: 5–83. Archived(PDF) from the original on 2021-02-20. Retrieved 2019-12-17.
Kerckhoffs, Auguste (February 1883). "La cryptographie militaire" [Military cryptography] (PDF). Journal des sciences militaires [Military Science Journal] (in French). IX: 161–191. Archived(PDF) from the original on 2021-02-20. Retrieved 2019-12-17.
Bellovin, Steve (23 June 2009). "Security through obscurity". RISKS Digest. 25 (71). Archived from the original on 10 June 2011. Retrieved 18 September 2010.
Kerckhoffs, Auguste (January 1883). "La cryptographie militaire" [Military cryptography] (PDF). Journal des sciences militaires [Military Science Journal] (in French). IX: 5–83. Archived(PDF) from the original on 2021-02-20. Retrieved 2019-12-17.
Kerckhoffs, Auguste (February 1883). "La cryptographie militaire" [Military cryptography] (PDF). Journal des sciences militaires [Military Science Journal] (in French). IX: 161–191. Archived(PDF) from the original on 2021-02-20. Retrieved 2019-12-17.