What is your favorite coding system

Coding

Suppose you suddenly discover an ugly scratch on your favorite CD and now fear the notorious cracking when playing from your painful experience with the "black discs". However, you find with joyful surprise that your beloved music is still sounding free of interference. Wouldn't you then also ask yourself how something like this is possible? Or: Isn't it sometimes uncomfortable for you that you have to use the many different passwords that you have for your Eurocheck card, for your bank vault, for BTX participation, for your account management via BTX, for access to the central computer in your company, to the PC Network, your notebook, your car radio, etc. always have to keep in mind, because of course you don't write these passwords down anywhere - security-conscious as you are? And then did you wonder how you put all these passwords in an encrypted file in such a way that they are really only available to you? On the following pages you will find answers to these and similar questions. The subject we are dealing with is that of coding methods and includes both the task of eliminating data errors and that of data encryption. Some of what we discover will probably even astonish you, especially because we work almost exclusively with whole numbers. You have probably hardly suspected what astonishing things you can do with these whole numbers, which you may have always regarded as inconspicuous. You don't necessarily have to start over.