anyfile2bmp is a program to encrypt or decipher files with .bmp format.

anyfile2bmp [OPTION] [SRCFNAME] [DESFNAME] [KEYWORD]

anyfile2bmp has 4 options. Actually, 'Option' is NOT optional. It decides what program will do.

• --help, -h : shows help message
• --version : shows program version
• --encrypt, -e : encrypt [SRCFNAME] to [DESFNAME] with [KEYWORD]
• --decipher, -d : decipher [SRCNAME] to [DESFNAME] with [KEYWORD]

For example, if you want to encrypt 'Secret.txt' with keyword 'MyPassword', Run this:

anyfile2bmp --encrypt Secret.txt NothingInHere.bmp MyPassword

Then 'NothingInHere.bmp' will be created, it contains encrypted informations of 'Secret.txt'. To decipher,

anyfile2bmp --decipher NothingInHere.bmp Original.txt 'MyPassword'

And Original.txt will created, it is the same one with 'Secret.txt' but more bigger.

1. Compile the source code - anyfile2bmp.c

2. (In Windows) Open CMD in the directory which has anyfile2bmp.exe

3. In the terminal...

   anyfile2bmp [OPTION] [SRCFNAME] [DESFNAME] [KEYWORD]

I'm trying to solve problems below. If you have some idea to solve them, please notice me:)

When encrypt files, because .bmp is 24-bit based image format, Some images(which contains more than 256 infos) are can't be shown.

Image file has pixel size. So, when you encrypt and decipher same files again, the result of decipher might be bigger than original one. It contains many '\0' at the end.

The keyword can be found when someone knows original file format. anyfile2bmp uses Vigenere Cipher so with original format, part of keyword can be leaked.