
February 3rd, 2000, 05:51 AM
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Registered User
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Join Date: Jun 1999
Location: Wiesbaden, Hessen, Germany
Posts: 2
Time spent in forums: < 1 sec
Reputation Power: 0
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Thank you very much Christopher,
I need bitwise XOR for an decryption engine which I have developed about a year ago. With a good friend we had programmed a small advertising game called "PHYSIKUS DriveIn" ("www.physikus.de", section "DriveIn"). It's a quite funny game with which you can win something. The cryption engine was embedded into VisualBasic and will now be ported to C++ for better performance. With this engine we have encoded the hiscore of the game into an alphanumerical code using a multiple shifting XOR sieve. There are several arrays with secret numbers as XOR sieves which have to be run through by the hiscore. It's a little bit like DES (of course less secure). I had no experience in dynamic web programming that time so we outsourced the online decryption engine to another company which programmed it in ASP. Today we want to make more of these games but don't want to use ASP any more (other companies always take more than i will take for myself...) That's why I want to use PHP for it.
Well, I made the same experience. I have bought the only two books on PHP which where ever published here in Germany. But both ones, written from different auhtors, doesn't include bitwise XOR even in their reference. One of these books has even 732 pages without the reference part. With reference this book counts over 1000 pages. So I never thought it could be possible that this huge tome could miss anything... But before that I could never imagine to use bitwise XOR, too. It's really not difficult programming but anything else but everyday usage of a programming language.
So after all I don't think I'm really making you looking bad URL At least you have mentioned bitwise XOR in contrast to the German books I have bought. Perhaps you can tell me where I can buy your book?
Thanks again,
Kar-Wing
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