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Home > College Algebra > Ciphers > ROT-18 Cipher (encoder / decoder) example
29. ROT-18 Cipher example (encoder / decoder) ( Enter your problem )
( Enter your problem )
  1. Examples
 		Other related methods
  1. A1Z26 Cipher (Letter to number Cipher)
  2. ADFGVX Cipher
  3. ADFGX Cipher
  4. Affine Cipher
  5. Alberti Cipher
  6. Atbash Cipher
  7. Autokey Cipher / Autoclave Cipher
  8. Bacon Cipher
  9. Beaufort Cipher
  10. Bifid Cipher
  11. Caesar Cipher
  12. Chaocipher
  13. Columnar transposition Cipher
  14. Double Transposition Cipher
  15. Enigma machine Cipher
  16. Four Square Cipher
  17. Gronsfeld Cipher
  18. Hill Cipher
  19. Kamasutra Cipher | Vatsyayana Cipher
  20. Morse Code Translator
  21. Multiplicative Cipher | Decimation Cipher
  22. Nihilist Cipher
  23. Playfair Cipher
  24. Polybius Square Cipher
  25. Porta Cipher
  26. Rail fence Cipher
  27. ROT-5 Cipher
  28. ROT-13 Cipher
  29. ROT-18 Cipher
  30. ROT-47 Cipher
  31. ROT-N Cipher
  32. Running Key Cipher
  33. Substitution Cipher
  34. Tap code Cipher | Knock code Cipher
  35. Three Square Cipher
  36. Trifid Cipher
  37. Trithemius Cipher
  38. Two-square Cipher
  39. Vigenere Cipher
28. ROT-13 Cipher
(Previous method)		30. ROT-47 Cipher
(Next method)

1. Examples


1. ROT-18 Cipher encoder

Text : ABCD efghi 12345
ROT Method : ROT-18 (a-z, 0-9)

Solution:
The ROT-18 cipher is a shift cipher, where (ROT-13) each letter is shifted by 13 positions down the alphabet 'A-Z' and (ROT-5) each digit is shifted by 5 positions down in 0123456789

ROT-18 = ROT-13 + ROT-5
ROT-13
PlaintextABCDEFGHIJKLMNOPQRSTUVWXYZ
x012345678910111213141516171819202122232425
(x+13) mod 26131415161718192021222324250123456789101112
CiphertextNOPQRSTUVWXYZABCDEFGHIJKLM

ROT-5
Plaintext Alphabet0123456789
Ciphertext Alphabet5678901234

Plaintext : ABCD efghi 12345
Ciphertext : NOPQ rstuv 67890
2. ROT-18 Cipher encoder

Text : hello world 56789
ROT Method : ROT-18 (a-z, 0-9)

Solution:
The ROT-18 cipher is a shift cipher, where (ROT-13) each letter is shifted by 13 positions down the alphabet 'A-Z' and (ROT-5) each digit is shifted by 5 positions down in 0123456789

ROT-18 = ROT-13 + ROT-5
ROT-13
PlaintextABCDEFGHIJKLMNOPQRSTUVWXYZ
x012345678910111213141516171819202122232425
(x+13) mod 26131415161718192021222324250123456789101112
CiphertextNOPQRSTUVWXYZABCDEFGHIJKLM

ROT-5
Plaintext Alphabet0123456789
Ciphertext Alphabet5678901234

Plaintext : hello world 56789
Ciphertext : uryyb jbeyq 01234



This material is intended as a summary. Use your textbook for detail explanation.
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28. ROT-13 Cipher
(Previous method)		30. ROT-47 Cipher
(Next method)


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