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How to cript/encript image GFX (bitmap) in .RBO file


Raffa50
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Cryptography is Old-Greek (κρυπτός, kryptos, "hidden, secret"; and γράφω, gráphō, "I write") for "secret writings", that simply means that it is written in a way most people can't interpret it. However, if you know the key(s) to it, you can interpret it.

There are basically two types of digital encryption which are symmetric encryption and asymmetric encryption.

Symmetric encryption uses the same key for both encryption and decryption (e.g. Advanced Encryption Standard or AES for short). Asymmetric encryption uses a separate key for encryption and decryption (e.g. Rivest, Shamir and Adleman).

Symmetric Encryption Scheme:
Interpretable Text <== Encryption/Decryption ==> Non-interpretable Text

Expanded:
Interpretable Text == Encryption ==> Non-interpretable Text
                          ^
                          |
                        [ Key ]
                          |
                          V
Interpretable Text <== Decryption == Non-interpretable Text

Asymmetric Encryption Scheme:
Interpretable Text == Encryption ==> Non-interpretable Text
                          ^
                          |
                  [ Encryption Key ]

                  [ Decryption Key ]
                          |
                          V
Interpretable Text <== Decryption == Non-interpretable Text

In asymmetric encryption the keys usually have an relation though so they can use the same procedure for both encryption and decryption, whereas decryption usually is an inverse form of encryption.

**Summarised**: encryption means that an interpretable text gets converted into a non-interpretable text using a key, decryption means that the non-interpretable text gets converted into an interpretable text, using either the same or a different key.

**Note**: encryption and decryption are actually worthless for GFX, they only make the life of the person who wants to graphics more difficult, although it's still easy to actually retrieve the actual contents.

Regards,
  Godlord.
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