[DUG] Licencing schemes

[John Bird]

Yes, that was one sort of thing I was thinking of.

The scheme you mentioned appeals greatly because of its simplicity - applies
to licencing up to a fixed licenced number of concurrent users.  I didn't
know there was a way to lock one byte - how do you do that?? 

I was more leaning to licencing it per screen installed - it can be more
costly for the users but as the app is likely to be running much of the day
that is academic in this case.  

John


-----Original Message-----
From: Neven MacEwan [mailto:neven at mwk.co.nz] 
Sent: Saturday, 29 April 2006 1:14 p.m.
To: johnkbird at paradise.net.nz; NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] Licencing schemes


John

I always liked the idea of a .lic file, your app attempts to 
exclusivlely open a 1 byte block until it suceeds and keeps the block 
locked whilst running, This way a 10 byte file would allow for 10 users, 
if the system crashes then the system is self-fixing, no messy unlock 
procedures, also the name of the lic file can be a hash with the size 
(stop some smartass hacking it with notepad)

if no lic file is found demo mode is used, if it fails to open a block 
in the lic file, 'out of users' error

HTH

N

John Bird wrote:
> I am putting some licencing code into some programs, common sort of 
> scheme where the program runs in a demo mode, but if has been 
> registered switches to full mode.
> 
> My preference is for licencing information to be stored only in one 
> central shared file on a server, nothing in pc registrys, so that when 
> a pc is upgraded or replaced there is no reinstallation needed.
> 
> I think I can do a simple and pretty foolproof scheme based on this
> 
> What do others use?
> 
> (I would only use another scheme if it was not using registry stuff as 
> I want centralised administration)
> 
> 
> John
> 
> _______________________________________________
> Delphi mailing list
> Delphi at ns3.123.co.nz http://ns3.123.co.nz/mailman/listinfo/delphi
> 
> 

-- 
Neven MacEwan (B.E. E&E)
Ph. 09 620 1356 Mob. 027 4749 062

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