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.
Enter at least one keyword. (Two is more secure.)
Optional, but recommended for security.
Enter a keyword, phrase or alphabet and the rest will be calculated for you.