I guess if that was possible, and batches of CD's had sequential numbers you could just check whether the CD was in a certain range.
Biju, how are you going to produce the CD's - manually, or with a proper replication firm? What's the prospective run of CD's, just a few, couple of hundred or thousands? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Whybird Sent: 21 June 2005 09:41 To: Lingo programming discussion list Subject: Re: <lingo-l> How to prevent copying a file from CD to HD oranotherCD:: Part2 Not sure if this will help at all, but discs do have a serial number, which you can access with either BuddyAPI Xtra's baDiskInfo function or DirectOS Xtra's dosGetDriveInfo BUT a) it may be copied when a full copy of the CD is made I think, and b) I don't know how you can get this serial number in advance of burning your CD (maybe just get it on the blank CD? I don't know - or it may be a part of the disc image) -- Mark Whybird Tim Welford wrote: >Unfortunately, there will always be a way around any security technique. >Does this "illegal data track" solve the problem of direct CD copy then? > >-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of biju george >Sent: 21 June 2005 07:30 >To: Lingo programming discussion list >Subject: RE: <lingo-l> How to prevent copying a file from CD to HD >oranotherCD :: Part2 > >Hi List, > >Thanks everyone for the active mindstorming!! > >Actually I want the user to see the work without any >"demo only" message/watermarks. It should be working >on any date but only from the cd we are handing over >to the user. > >Brian pointed out about checking the creation date. >But in todays CD writers we can choose either the >files original date or the date we actually burn it. >Also he can copy the files after manually changing the >Date on the system to the original date. So that don't >do. > >Its not a demo cd so allowing the program to run for a >selected days/weeks/months won't do much. > >Hardware protection will be more expensive and so we >not going for that. > >Also we can do this during glass masterting but that >too not viable now. > >Its the final cd we are planning to give user. But he >should not be able to replicate all the files to >another CD. I think I made it clear now. > > >I know that, there are solutions for this using some >CD writing programs. They actually do this by adding >another illegal data/track to the cd which is illegal >TOC can't be copied to any other machine but our >program will run ok as it was written on the right >track. Some game develpers are doing this. But don't >know where to find some guidance. > > >Regards, >Biju George. > > > [To remove yourself from this list, or to change to digest mode, go to http://www.penworks.com/lingo-l.cgi To post messages to the list, email lingo-l@penworks.com (Problems, email [EMAIL PROTECTED]). Lingo-L is for learning and helping with programming Lingo. Thanks!] [To remove yourself from this list, or to change to digest mode, go to http://www.penworks.com/lingo-l.cgi To post messages to the list, email lingo-l@penworks.com (Problems, email [EMAIL PROTECTED]). Lingo-L is for learning and helping with programming Lingo. Thanks!]
