[DUG] Licencing schemes

[Neven MacEwan]

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
> 
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> 
> 

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

New Address Details
===================
MWK Computer Systems
1 Taumata Rd
Sandringham
Auckland

Ph 620 1356
Fx 620 1336
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