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Tabletop cryptography
The document discusses tabletop cryptography. It begins with an introduction of the author and then covers terms, the history of selected ciphers like rotation ciphers and transposition ciphers, and provides examples of ciphers like the Vigenere cipher, route cipher, and VIC cipher. The examples demonstrate how each cipher works by providing plaintext, keys, and resulting ciphertext.
Tabletop cryptography
- 1.
- 2. Who Am I? ●https://frankcash.github.io/ ● Twitter: @hackthethings ● Github: @frankcash
- 3. Tabletop Cryptography ● Terms ●History of Selected Ciphers ● Example Ciphers
- 4. Tabletop Cryptography ● Terms ●History of Selected Ciphers ● Example Ciphers
- 5. Terms ● Plaintext ● Cipher ●Ciphertext
- 6. Tabletop Cryptography ● Terms ●History of Selected Ciphers ● Example Ciphers
- 7. History of SelectedCiphers ● Rotation Ciphers ● Transposition Cipher ● Nihilist Ciphers
- 8. Rotation Ciphers ● Notthe First Cipher Used ● Used by Caesar ● Common Sub-Cipher
- 9. Transposition Cipher ● ScytaleUsed by Greeks ● Used During Civil War ● Strengthens Weak Ciphers
- 10. Nihilist Ciphers ● SymmetricEncryption ● Russian Nihilists (1880s) ● Soviet Spies (WWII - Cold War)
- 11. Tabletop Cryptography ● Terms ●History of Selected Ciphers ● Example Ciphers
- 12. Example Ciphers ● VigenereCipher ● Route Cipher ● VIC Cipher
- 13. Vigenere Cipher ● ComplexSubstitution Cipher ● Builds on Caesar Shift ● Commonly Used in CTFs ● Utilizes a Key
- 14. Vigenere Cipher ● UtilizeVigenere Table ● Encrypting: Row (Plaintext) -> Column (Key) = Ciphertext ● Decrypting: Column (Key) -> Row (Ciphertext) Output = Plain(text) Vigenere Table
- 15. Vigenere Cipher ● Plaintext:A Game. A Movie Star. ● Key (Repeats): Pragyan ● Ciphertext: p xasc. a zdmik qtng. Vigenere Table
- 16. Route Cipher ● Belongsto Transposition Family ● Lots of Possible Keys
- 17. Route Cipher ● Plaintext:attack at dawn. hello world. ● Key: Descending Vertical Column. ● Ciphertext: akwll tanod tthwq adeoq calrq
- 18. VIC Cipher ● Belongsto Nihilist Ciphers ● Used by PoWs in Vietnam ● Regarded as Most Complex Hand Cipher ● Checkerboard Transposition
- 19. VIC Cipher ● Plaintext:Attack at dawn ● Ciphertext: 03-01-01-03-21-27 03-01 22-03-65-05 Straddling Checkerboard
- 20. Tabletop Cryptography ● Terms ●History of Selected Ciphers ● Example Ciphers
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