Decrypting Text

The Colossus at Bletchley

Heading

Deciphering encrypted text can be challenging and time consuming. These programs will reduce some of the hack work allowing you to look for patterns. In most cases there is a form with example text for you to experiment with. Conversely, you can paste your own ciphertext into the form for decryption.

Caesar shifts - displays all the 26 letter shifts
Frequency analysis - calculates letter frequencies and other patterns
Letter substitution - try replacing letters and see the effects
Affine shift ciphers - letter substitutions follow a mathematical relationship
Vignère encryption - several coding sequences are used
Transposition cipher - text is placed in columns and then reordered to encrypt
ADFGVX cipher - Decrypt a substitution and transposition cipher.
ADFGVX cipher - Encrypt a substitution and transposition cipher.
Text test - a simple way of seeing what characters are passed over in a form