How do you prevent CD copying ?

What's going to be on the CD ? Ordinary computer files ? You'll be hard-pressed to do anything to protect those.

This person is a 'friend' yet you don't trust him ?

Graham

If it can be read it can be copied. If text, no matter what you do to it you could always just take a screen snapshot.

It's the same with music CDs - you may make it difficult to make a clone or digital copy but you can still do it via analogue.

You do know that, if the work is his, a copyright existed from the moment it came into being, at least in the US that's how it works. It is just easier to defend if you have registered your copyright. That being said, I know what one company does is to provide a password protected ZIP file, and each copy has a different password. If they find an unauthorized copy out there at least they can trace it back to the original owner. If the info is that sensitive, you might check into a quick and dirty trade secret agreement.

Jim

This is not a repair issue, so why in the world are you posting this here?

Your's is at least the second post today that is off-topic.

Michael

As you can see, several people answered my post without any objections. You are in the minority my friend. The title of the post pretty much describes what the post is about. In the future, if you don't like a post just skip it and go to the next one. Do not act as a Google cop.

Give it to him in .pdf format as an e-mail enclosure. At least he cannot then alter the file.

But:

If you give it to him on paper, he can scan it. If you give it to him as a standard Word/Excel/equivalent file, he can alter it and then re-use it freely. _ANY_ CD may be duplicated with sufficiently sophisticated software, or via analog playback.

So, forget giving it to him on as any sort of electronic file that cannot be duplicated. The best you can hope for is to make it difficult to change (.pdf or similar). NOT impossible, simply difficult.

Peter Wieck Wyncote, PA

FYI .pdf is easily scanned. I think this ends up as a trust issue.

No, not really. A few CD copy protection schemes have been devised, but they usually cause more problems than they solve, and all of them can be cracked. The only way to prevent something from being copied is to not allow anyone else to have it in the first place.

The OP could pack the files into a self extracting RAR file or series of files protected with a password then record that to disc. Those intended to use the data could then extract it on their end.

Aside from compressed file password protection is no real protection at all, the OP said he didn't want his *destination* to duplicate the CD.

That is, he wants to pass over information for limited use, then throw it away when they're done.

This requires trust on the side of the destination. And he clearly doesn't have that.

Sheesh.

This is NOT Google. This is UseNet. In fact, many UseNetter's wish that Google would stop allowing people to post to UseNet through their interface.

Well if it's password protected then the data is unusable and copying then becomes a non-issue. And when does a password offer no protection at all? Explain that one to me.

Yeh I realize that and it really isn't an issue as long as those who are privy to the data have the proper password

Oh hell yes! You wouldn't believe the spam that google churns out daily.

Well I feel that this is a totally relevant question for this group... What if you have some sensitive material that is electronics related and you don't want your info all over the web.

Well for the intended user to access the data, they have to know the password as well, at which point they can simply remove the password or give it to anyone they give a copy to. For what the OP requested, a password offers no protection.

what what you may to the CD, it does not matter because he can simply move the data else where via normal routines.

WHat you could do how ever, is have a special app for lets say viewing the contents which has been incrpyted and only the viewer can show and thus also test for it from a CD>

Place a physical error on the CD and have the reader look for it:)

Jamie wrote in news:l2Eei.131$ snipped-for-privacy@newsfe03.lga:

Or write the data, then take it to a parking lot, place written side down on ground, place foot on top and slide it all around. Now it can't be copied.

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----

----= East and West-Coast Server Farms - Total Privacy via Encryption =----

News==----

Newsgroups

You may think it's funny how ever, not to long ago I was supplying an application that I wanted to protect. I had it on CD, and before shipping, I would place a physical error in a section that contained a large data table so that i know (after trial and error) of a few bad disc where it was. I would damage an area. then read the data table to locate the first error. Scan it several times incase it produced other errors and produced a serial number from that. It actually worked very nicely.. One could copy the file from CD's all they wanted for backups, but they couldn't get a working copy with out the original disc. Oh Well, it was nice until the company went out of business!

Sure I would. :)