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How I can protect the program from REFOX?
Message
 
À
02/11/1998 05:44:44
Cetin Basoz
Engineerica Inc.
Izmir, Turquie
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00152987
Message ID:
00153450
Vues:
26
Thanx Cetin,

I will look into it... Bob

>Bob,
>I've got a developer evaluation version from HASP. I've been experimenting with it for one week. It has two level of protection (more but basically two). One uses API calls from within the application and easily implemented. This part is of course open to decompiled code. The second protection (I hope works with VFP exe not tested yet) adds an envelope to exe. Scrambles the exe code, adds HASP key detection code and antidebugging code all about 160K. I didn't test this one yet and have little hope works with VFP exe (FP DOS were resistant to LZEXE compression and things such as Novel X flag, but this not a compression so might work). HASP claims unique developer code and passwords are burnt into a 2500 gate, 1.5 micron ASIC which can't be reverse engineered and virtually impossible to crack (?). I, as a developer hope it's true and more hope envelope works with VFP :) If all is true, NetHasp has extra features too :) (can be connected to any WS in net, access to app count at the same
>time may be limited to n users, one key could control up to 112 different apps, keys could be daisychained, keys work transparently, keys has additional 496 bytes of RW memory where you could store extra info, keeps a log table that you can monitor and all interface with the key requires password etc).
>Just the API part works seamlessly (Win95, WinNT and VFP5). If the envelope also works (I'll try it ASAP in a few days) I think it will be my choice in addition to my own software protection (yeah still I won't drop them :)
>BTW if you have refox would you try decompiling just this one line code :
? (1+2)/2*(5+3)
Cetin
>>Cetin,
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