In the Wikipedia article on Block Encryption Modes , they have a neat little diagram of an unencrypted image, the same image encrypted using ECB mode, and a different version of the same image encrypted in a different way.
At the university, I developed my own implementation of DES ( you can find it here ), and we must demonstrate our implementation in a presentation.
, , . , . , , , .
, - , ? , - - , ?
,
. , , DES , ECB , . , , , .
, Java, python .., , , . , , . , . , . , .
, ( -). . .
Netpbm, , . , , , ( ).