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This is a discussion on file within the C++ Programming forums, part of the General Programming Boards category; Hello i nead code to open a file then encrypt it and save it agian thank you. I need the ...

  1. #1
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    file

    Hello i nead code to open a file then encrypt it and save it agian
    thank you. I need the help because i dont know how to encrypt.

  2. #2
    Registered User ski6ski's Avatar
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    Encription is simple, or you can use a multiple matrix to make 128bit encription. (I think that is how it is done) I know useing a matrix is realy good to encript a message, because we did that in our math class.

    For matrix, you need to learn alot about algebra!

    For simple, just reverse the alphabet a=z b=y c=x...........

    As for >> nead code to open a file then encrypt it and save it agian

    Look up ofstream and ifstream and include fstream.h
    i is for in and o is for out.
    C++ Is Powerful
    I use C++
    There fore I am Powerful

  3. #3
    Hamster without a wheel iain's Avatar
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    another way, this is a method i used for a password program - take the text you want to encrypt as an array. Cast each member to an int. Then add the present value to te last value and the next value, tis way it will be different for every string entered.
    Monday - what a way to spend a seventh of your life

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