140 http://inventwithpython.com/hacking

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18. message = ''.join(message) # convert list to string


19. 
    


20. print('Test #%s: "%s..."' % (i+1, message[:50]))


21. 
    


22. 
    

    Check all possible keys for each message.

    
    


23. for key in range(1, len(message)):


24. encrypted = transpositionEncrypt.encryptMessage(key, message)


25. decrypted = transpositionDecrypt.decryptMessage(key, encrypted)


26. 
    


27. 
    

    If the decryption doesn't match the original message, display

    
    


28. 
    

    an error message and quit.

    
    


29. if message != decrypted:


30. print('Mismatch with key %s and message %s.' % (key,
    message))


31. print(decrypted)


32. sys.exit()


33. 
    


34. print('Transposition cipher test passed.')


35. 
    


36. 
    


37. 
    

    If transpositionTest.py is run (instead of imported as a module) call

    
    


38. 
    

    the main() function.

    
    


39. if name == 'main':


40. main()

Sample Run of the Transposition Cipher Tester Program

When you run this program, the output will look like this:

Test #1: "KQDXSFQDBPMMRGXFKCGIQUGWFFLAJIJKFJGSYOSAWGYBGUNTQX..."
Test #2: "IDDXEEWUMWUJPJSZFJSGAOMFIOWWEYANRXISCJKXZRHMRNCFYW..."
Test #3: "DKAYRSAGSGCSIQWKGARQHAOZDLGKJISQVMDFGYXKCRMPCMQWJM..."
Test #4: "MZIBCOEXGRDTFXZKVNFQWQMWIROJAOKTWISTDWAHZRVIGXOLZA..."
Test #5: "TINIECNCBFKJBRDIUTNGDINHULYSVTGHBAWDQMZCNHZOTNYHSX..."
Test #6: "JZQIHCVNDWRDUFHZFXCIASYDSTGQATQOYLIHUFPKEXSOZXQGPP..."
Test #7: "BMKJUERFNGIDGWAPQMDZNHOQPLEOQDYCIIWRKPVEIPLAGZCJVN..."
Test #8: "IPASTGZSLPYCORCVEKWHOLOVUFPOMGQWZVJNYQIYVEOFLUWLMQ..."
Test #9: "AHRYJAPTACZQNNFOTONMIPYECOORDGEYESYFHROZDASFIPKSOP..."
Test #10: "FSXAAPLSQHSFUPQZGTIXXDLDMOIVMWFGHPBPJROOSEGPEVRXSX..."
Test #11: "IVBCXBIHLWPTDHGEGANBGXWQZMVXQPNJZQPKMRUMPLLXPAFITN..."
Test #12: "LLNSYMNRXZVYNPRTVNIBFRSUGIWUJREMPZVCMJATMLAMCEEHNW..."
Test #13: "IMWRUJJHRWAABHYIHGNPSJUOVKRRKBSJKDHOBDLOUJDGXIVDME..."
Test #14: "IZVXWHTIGKGHKJGGWMOBAKTWZWJPHGNEQPINYZIBERJPUNWJMX..."
Test #15: "BQGFNMGQCIBOTRHZZOBHZFJZVSRTVHIUJFOWRFBNWKRNHGOHEQ..."
Test #16: "LNKGKSYIPHMCDVKDLNDVFCIFGEWQGUJYJICUYIVXARMUCBNUWM..."