Double Transposition Cipher
The double transposition cipher (AKA double columnar transposition) was used by military forces in World War I and II. It is basically a columnar transposition followed by another columnar transposition. It is considered one of the most secure ciphers that can be performed by hand.
You must enter the plaintext.
Enter at least one keyword. (Two is more secure.)
You must enter at least one keyword.
Keyword must be at least two characters.
Keyword #2
Optional, but recommended for security.
Optional, but recommended for security.
Alphabet Key
Enter a keyword, phrase or alphabet and the rest will be calculated for you.
Enter a keyword, phrase or alphabet and the rest will be calculated for you.
You must enter the ciphertext.
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