Uploaded July 2024 | Updated September 2026, 1 week ago
Thank you to Private Internet Access VPN for sponsoring this video.
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During the American Civil War (1861-65), both the Union and the Confederacy used a variety of codes and ciphers to protect vital communications - with varying degrees of success. In this episode, we look at some of the most common systems used by both sides.
0:00 Introduction
1:26 Private Internet Access VPN Sponsor Segment
3:08 Jefferson Wheel Cipher/M-94
7:42 Difference Between Codes and Ciphers
10:18 Stager Route Cipher
15:24 Confederate Substitution Ciphers
16:39 Vigenere Cipher
18:15 Confederate Cipher Cylinder/Disk
19:40 Cryptanalysis of Vigenere Cipher
22:30 One-Time Pad Ciphers
23:13 Book/Dictionary Codes
24:09 Grille Ciphers
26:41 Outro
SOURCES:
ww2.amstat.org/mam/06/Sauerberg_route-essay.html
c3teachers.org/wp-content/uploads/2016/01/ExplainerCipherintheCivilWar-Final.pdf
cryptiana.web.fc2.com/code/civilwar0.htm
monticello.org/research-education/thomas-jefferson-encyclopedia/wheel-cipher
cryptomuseum.com/crypto/usa/ccd/index.htm
lincolnconspirators.com/2019/07/26/john-wilkes-booths-confederate-cipher
cryptiana.web.fc2.com/code/civilwar5.htm#SEC2
cryptiana.web.fc2.com/code/civilwar4.htm
cryptiana.web.fc2.com/code/civilwar6.htm
Thank you to Private Internet Access VPN for sponsoring this video.
By clicking my link - piavpn.com/ourowndevices - you can get 83% off on Private Internet Access! That’s just $2.03 a month, and you also get 4 extra months completely for free!
During the American Civil War (1861-65), both the Union and the Confederacy used a variety of codes and ciphers to protect vital communications - with varying degrees of success. In this episode, we look at some of the most common systems used by both sides.
0:00 Introduction
1:26 Private Internet Access VPN Sponsor Segment
3:08 Jefferson Wheel Cipher/M-94
7:42 Difference Between Codes and Ciphers
10:18 Stager Route Cipher
15:24 Confederate Substitution Ciphers
16:39 Vigenere Cipher
18:15 Confederate Cipher Cylinder/Disk
19:40 Cryptanalysis of Vigenere Cipher
22:30 One-Time Pad Ciphers
23:13 Book/Dictionary Codes
24:09 Grille Ciphers
26:41 Outro
SOURCES:
ww2.amstat.org/mam/06/Sauerberg_route-essay.html
c3teachers.org/wp-content/uploads/2016/01/ExplainerCipherintheCivilWar-Final.pdf
cryptiana.web.fc2.com/code/civilwar0.htm
monticello.org/research-education/thomas-jefferson-encyclopedia/wheel-cipher
cryptomuseum.com/crypto/usa/ccd/index.htm
lincolnconspirators.com/2019/07/26/john-wilkes-booths-confederate-cipher
cryptiana.web.fc2.com/code/civilwar5.htm#SEC2
cryptiana.web.fc2.com/code/civilwar4.htm
cryptiana.web.fc2.com/code/civilwar6.htm
