Translated from J. Orlin Grabbe's masterpiece "DES Algorithm Illustrated", many foreign universities this article as a supplement, can be understood as the best Primer DES algorithm. In contrast many textbooks introducing DES directly copy a flow chart diagram IP and other abbreviations without explanation, misleading; many blog directly given crappy source of internal processes lack of interpretation. In fact, DES is not complicated in algorithm, but many processes only. In this case the use of a simple example of what can be easily understood manual deduction. DES (Data Encryption Standard) algorithm is the most commonly used encryption algorithm. For a long time, many people present ...
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