- Monoalphabetic
- Caesar Cipher
- Atbash Cipher
- Keyword Cipher
- Pigpen / Masonic Cipher
- Polybius Square
- Polyalphabetic
- Vigenère Cipher
- Beaufort Cipher
- Autokey Cipher
- Running Key Cipher
- Polygraphic
- Playfair Cipher
- Bifid Cipher
- Trifid Cipher
- Four-square cipher
- Transposition
- Rail Fence
- Route Cipher
- Columnar Transposition
- Miscellaneous
- Book Cipher
- Beale Cipher
- Morse Code
- Tap Code
- One-time Pad
- Scytale
- Semaphore
- ASCII Code
- Steganography
- Techniques
- Frequency Analysis
- Books
Codes and Ciphers
Codes and Ciphers
- Monoalphabetic
- Caesar Cipher
- Atbash Cipher
- Keyword Cipher
- Pigpen / Masonic Cipher
- Polybius Square
- Polyalphabetic
- Vigenère Cipher
- Beaufort Cipher
- Autokey Cipher
- Running Key Cipher
- Polygraphic
- Playfair Cipher
- Bifid Cipher
- Trifid Cipher
- Four-square cipher
- Transposition
- Rail Fence
- Route Cipher
- Columnar Transposition
- Miscellaneous
- Book Cipher
- Beale Cipher
- Morse Code
- Tap Code
- One-time Pad
- Scytale
- Semaphore
- ASCII Code
- Steganography
- Techniques
- Frequency Analysis
- Books
- Monoalphabetic
- Caesar Cipher
- Atbash Cipher
- Keyword Cipher
- Pigpen / Masonic Cipher
- Polybius Square
- Polyalphabetic
- Vigenère Cipher
- Beaufort Cipher
- Autokey Cipher
- Running Key Cipher
- Polygraphic
- Playfair Cipher
- Bifid Cipher
- Trifid Cipher
- Four-square cipher
- Transposition
- Rail Fence
- Route Cipher
- Columnar Transposition
- Miscellaneous
- Book Cipher
- Beale Cipher
- Morse Code
- Tap Code
- One-time Pad
- Scytale
- Semaphore
- ASCII Code
- Steganography
- Techniques
- Frequency Analysis
- Books
ASCII Code
ASCII is a code used by computers to represent characters as numbers. This allows computers to store a letter as one byte of information. One byte of information allows you to represent 256 different values, which is enough to encode all the letters (uppercase and lowercase) as well as the numbers 0-9 and other special characters such as the @ symbol.
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