Article View: comp.os.ms-windows.programmer.misc
Article #2456Re: modifying a variable in a Windows .EXE without re-linking???
From: Jon Wtte
Date: Mon, 04 Jan 1993 16:04
Date: Mon, 04 Jan 1993 16:04
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In <1993Jan3.205027.28520@emr1.emr.ca> jagrant@emr1.emr.ca (John Grant) writes:
>position of a variable in the .EXE, knowing the offset etc into
>a segment like DGROUP. I'm using Borland C++ 3.1.
Ah, but as soon as someone sees what you're doing (in a debugger)
he can do it himself; that copy protection would break in three
seconds blank.
A _slightly_ better approach would be to encrypt various (code)
parts of the .EXE with, say, a CRC taken of the data set AND the
variable, as key.
Cheers,
/ h+
--
-- Jon W{tte, h+@nada.kth.se, Mac Hacker Deluxe --
"You NEVER hide the menu bar. You might go about and change the color
of it to the background color, but you never HIDE the menu bar."
-- Tog
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Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!spool.mu.edu!enterpoop.mit.edu!eru.mt.luth.se!kth.se!dront.nada.kth.se!d88-jwa From: d88-jwa@dront.nada.kth.se (Jon Wtte) Newsgroups: comp.os.ms-windows.programmer.misc Subject: Re: modifying a variable in a Windows .EXE without re-linking??? Message-ID: <1993Jan4.160418.19426@kth.se> Date: 4 Jan 93 16:04:18 GMT References: <1993Jan3.205027.28520@emr1.emr.ca> Sender: usenet@kth.se (Usenet) Organization: Royal Institute of Technology, Stockholm, Sweden Lines: 22 Nntp-Posting-Host: dront.nada.kth.se