Re: [OT] serial number validation algorithm? - Sign/verify data
Re: [OT] serial number validation algorithm? - Sign/verify data
- Subject: Re: [OT] serial number validation algorithm? - Sign/verify data
- From: "seaside.ki" <email@hidden>
- Date: Tue, 7 Oct 2003 18:26:55 +0200
We developed a small library, which uses a public key algorithm
to
- create serials on your developer mac using public/private keys
- verify serials on your customer's mac using public key.
Using this scheme, you may not send a serial to your client, but as
well attach
information like
- customer name
- customer address
- license size and date information
to the registration key file.
Since the verification process checks not only the number, but all
information
inside the registration data structure, the registration data is not
very useful
for third persons, since it is personalized. Any chance of any byte
will result
in verification problems.
Stefan
Am Montag, 06.10.03 um 13:15 Uhr schrieb petite_abeille:
Hello,
This is slightly off-topic... but it seems a popular question judging
from the mailing archives... still I'm not quiet clear about how to
handle that :/
This is mostly about how to validate a serial number... not
necessarily how to enforce it...
Assuming I have the right ingredients to seed a SN, what would be the
most straightforward way to validate such a number?
Looking around the net, I stumbled upon what credit card issuers seem
to use: the "Luhn Formula".
Here is an illustration:
http://www.brainjar.com/js/validation/default2.asp
Anyone have some experience using such a scheme to validate a serial
number? Any other "standard" alternatives?
Thanks in advance :)
Cheers,
PA.
P.S.
If you feel this question is too "sensitive" to debate in public, feel
free to contact me privately :)
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