copy protection

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A3...@cunyvm.cuny.edu

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Oct 16, 1994, 12:07:17 PM10/16/94
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I would like to add copy protection to my software. I already check for the di
sk's serial number, label and encrypted password file. If possible I would lik
e to do the following: 1) format the last sector of the floppy in such a way th
at standard copy programs like DiskCopy could not read it 2) Have the program c
heck this sector every time it runs to determine whether or not is is formatted
in this "special" way.
I have tried to do this on my own. I have Interrupt info, bios info, fat infom
, disk layout info but with no success. The best I have been able to do is dam
age disk information. Can someone please help me?

Sincerly,
Frank Tropea

Sergio Terenas

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Oct 18, 1994, 10:50:33 PM10/18/94
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In article <94289.12...@CUNYVM.CUNY.EDU>
<A3...@CUNYVM.CUNY.EDU> wrote :

> , disk layout info but with no success. The best I have been able to do is dam
> age disk information. Can someone please help me?

Frank,
Why not get one of these keys you need to plug to the parallel port in order
to run your program ? You can still use your printer. I bet that'd save
you time and money.

The down side of copy-protection is, of course, that many users won't buy
your applications just because it's copy protected and all the related
hassle.

Greetings,
Sergio Terenas

Justin MacLeod

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Oct 21, 1994, 2:05:42 PM10/21/94
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>...don't want dongles etc....

I strongly agree, dongles are not a good solution, but what is? I think the
ideal solution is to be able to make your original disk UNCOPIABLE to all
but say 5% of the best hackers. Have your program set up so that it can only
be installed from the original disk (not by simply copying files from one
computer to another), and have the disk so it can't be copied. Is this
possible though? Anybody out there looking for a program to write that has
huge market demand? Well, here it is, go for it!


--
Justin MacLeod, Bell Northern Research/Northern Telecom, Ottawa, Canada

rod

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Oct 22, 1994, 6:07:22 PM10/22/94
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> >...don't want dongles etc....
>
> I strongly agree, dongles are not a good solution, but what is? I think the
> ideal solution is to be able to make your original disk UNCOPIABLE to all
> but say 5% of the best hackers. Have your program set up so that it can only
> be installed from the original disk (not by simply copying files from one
> computer to another), and have the disk so it can't be copied. Is this
> possible though? Anybody out there looking for a program to write that has
> huge market demand? Well, here it is, go for it!
>
There is just such a program. Not only is the original disk uncopiable,
but the program can't even be successfully copied from the hard drive to
another machine. I have used it for 2 yrs very successfully and have
not found anyone who can crack it.
The program: EVERLOCK from Aztec Software, (816) 776-2700, 305 East
Franklin, Richmond MO 64085
The snag: you use a DOS based utility to install the protection on the
user's drive, even though the system can be used to protect Windows
programs.

Rod.

Rick Gebethner

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Oct 23, 1994, 12:26:30 AM10/23/94
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In article <1994Oct21.1...@bnr.ca>,

The old commodore 64 (think back now...) software used to be protected
through soft errors on the diskettes. The program would expect to find a
specific error on a track/sector and pooch out if it didn't find it.

This worked fine until copy code started showing up that would reproduce
the same errors on a target diskette. It became a cat and mouse game. It
made the aoftware harder to copy. People began to realize that it was more
fun and challenging to copy programs than it was to actually use them.

There's a moral in there somewhere...


- I like people, I just can't stand their ways.

--

Lars Jacobsen

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Oct 21, 1994, 10:51:40 AM10/21/94
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<<***** On 18.10.94, ser...@maipu.mic.cl wrote to ALL: *****>>

ss>In article <94289.12...@CUNYVM.CUNY.EDU>
ss><A3...@CUNYVM.CUNY.EDU> wrote :
ss>
ss>> , disk layout info but with no success. The best I have been able to
ss>do is dam
ss>> age disk information. Can someone please help me?
ss>
ss>Frank,
ss>Why not get one of these keys you need to plug to the parallel port in
ss>order
ss>to run your program ? You can still use your printer. I bet that'd save
ss>you time and money.
ss>
ss>The down side of copy-protection is, of course, that many users won't buy
ss>your applications just because it's copy protected and all the related
ss>hassle.
ss>
ss>Greetings,
ss>Sergio Terenas
ss>
ss>

Hey, stop for a while. If everyone was starting to use "dongles" (keys) to
prevent unauthorized people to use their programs, where would we end? I
don't want to switch "dongles" (imagine having 20 of those in your drawer)
every time I use a program, so there must be another way. That's my opinion
and I'm pretty sure there are a LOT of other people that means the same. I
believe it's a little bit better with a key disk, but on the other hand I
don't like this either.

Regards,

-----------------------------
*** Lars Jacobsen ***
Software-Engineer
E-mail : la...@powertech.no
-----------------------------
~~~
* VbReader 2.01 #NR * What has four legs and an arm? A happy pitbull.

Russell Turpin

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Oct 21, 1994, 6:54:06 PM10/21/94
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-*-----

In article <1994Oct21.1...@bnr.ca>,
Justin MacLeod <stu1...@bnr.ca> wrote:
> I strongly agree, dongles are not a good solution, but what is? ...

The good solution? It is what most platforms do: provide a standard
host ID mechanism. All we have to do is persuade Microsoft and Intel
to implement this very standard approach.

Russell
--
Q: What do you call a musician without a girlfriend?
A: Homeless.

Pat & Richard Bryant

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Oct 30, 1994, 8:18:18 AM10/30/94
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Erm. Sorry to disappoint you. This is possible to crack. As an
ex-member of the hacking fraternity I can catagorically state that
this program *is* vulnerable to straight, parallel or even remote
laplink connection. It's also a martyr to assembler 'code-bombs'.

As one who's cleaned up his act, I thought you should be told.

(Please don't kick me out; I'm a reformed character!)

Cheers

Bryan

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