Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!julius.cs.uiuc.edu!ux1.cso.uiuc.edu!uxa.cso.uiuc.edu!kds10773
From: kds10773@uxa.cso.uiuc.edu (Ken S.)
Newsgroups: comp.os.msdos.programmer
Subject: hd security (no a: boot)
Keywords: security boot
Message-ID: <1990Oct9.011955.26724@ux1.cso.uiuc.edu>
Date: 9 Oct 90 01:19:55 GMT
Sender: news@ux1.cso.uiuc.edu (News)
Organization: University of Illinois at Urbana
Lines: 26


  I've seen several programs that disable a hard disk unless the system
  is booted from that hard disk.  (PCLOCK, the Protec security system, etc).

  I believe that this may be done by changing the HD's media byte or other 
  data necessary for adding the drive to the device chain, but not checked
  at pre-boot time.  Does anyone have conformation of this or know of a 
  source of a simple PD program (for analysis) that does this?

  Thanks in advance!  (please MAIL responces to kds@uiuc.edu)

	- Ken

+--------------------------+---------------------------------------------+
| Ken Stillson   TcM(Ag)TS | "What is to be investigated is being only   |
| kds@uiuc.edu   MCAERTUF++| and- nothing else; being alone and further- |
| Hacker Science at the    | nothing; soley being, and beyond being-     |
| Univ of Illinois..       | nothing.  What about this nothing?  Does    |
+--------------------------+ the nothing exist only because the Not,     |
| ie: the Negation, exists?  Or is it the other way around?  Does the    |
| Negation and the Not exist only because the Nothing exists? ... We     |
| assert: the Nothing is prior to the Not and the Negation..  Where do   |
| we seek the Nothing?  How do we find the Nothing?..  We know the       |
| Nothing.  Anxiety reveals the Nothing..  The Nothing itself nothings." |
|                               - M. Heidegger, "Was Ist Metaphysik?"    |
+------------------------------------------------------------------------+