The Monoalphabetic Cipher (often referred to as a cryptogram) uses a KEY which is the rearrangement of the letters of the alphabet. These different letters are then substituted for the letters in the message to create a secret message. That KEY is needed to decipher the secret message. The Secret Code Breaker “Handbooks” have computer programs that can be used to assist in determining KEYs and decipher secret messages.
Here is an example of a typical secret message that the SCB Solver can crack:
DSDRO XFIJV DIYSB ANQAL TAIMX VBDMB GASSA QRTRT CGGXJ MMTQC IPJSB AQPDR SDIMS DUAMB CQCMS AQDRS DMRJN SBAGC IYTCY ASBCS MQXKS CICGX RSRCQ ACOGA SJPAS AQHDI ASBAK GCDIS AWSJN CMDKB AQHAR RCYAE
Get your FREE Secret Code Breaker – Monoalphabetic Cipher Solver Program. A program written by Chris Card that can determine the KEY and break most secret messages that have been enciphered using a Monoalphabetic Cipher. It is a different program than any of the codebreaker programs that come on the diskette included with “Secret Code Breaker – A Cryptanalyst’s Handbook” series.
The download is a Zip file. Requires IBM compatible computer, running Windows95 or above. Currently no Macintosh version is available.