Generating a UUID that is the same every time for a single system

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John Fly - 09 Mar 2007 21:24 GMT

I need a rock solid way to generate a UUID or similar ID, that will
generate the same ID every time for an individual system(computer).

I would not like to store the ID on the system(i.e file or in memory),

Any help is appreciated.

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Stefan Ram - 09 Mar 2007 21:30 GMT

>I need a rock solid way to generate a UUID or similar ID, that will
>generate the same ID every time for an individual system(computer).

OK, just give me a rock solid definition of »individual system«.

Is it the same system after the memory was extended, after the
operating system was upgraded/changed, after the processor was
changed, after the hard disk was exchanged, after the network
interface hardware was changed, after the network
identification was changed, after is has been sold/lend to
another owner ... ?

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John Fly - 10 Mar 2007 01:49 GMT

> >I need a rock solid way to generate a UUID or similar ID, that will
> >generate the same ID every time for an individual system(computer).
[quoted text clipped - 7 lines]
> identification was changed, after is has been sold/lend to
> another owner ... ?

Easily understood that no way to be 100%, but If I was doing this with
a C/C++ app I would usually try to grab the CPU ID, or some ID off the
motherboard.

Something that will change very infrequently.

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Joshua Cranmer - 10 Mar 2007 01:51 GMT

> I need a rock solid way to generate a UUID or similar ID, that will
> generate the same ID every time for an individual system(computer).
>
> I would not like to store the ID on the system(i.e file or in memory),
>
> Any help is appreciated.

There was a recent discussion on this in c.l.j.programmer under the
title "securing my software (unique computer identification number)",
first post 3/4/2007 1:32 PM (try
news:1173033132.670276.37620@30g2000cwc.googlegroups.com, I'm not sure
if that will work though).

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Arne Vajhøj - 12 Mar 2007 03:49 GMT

> I need a rock solid way to generate a UUID or similar ID, that will
> generate the same ID every time for an individual system(computer).

If it is the same for every call on the system, then it is not
an UUID.

:-)

I think you should use JNI to call some C++ that did something
very hardware specific to get an ID.

Arne

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Generating a UUID that is the same every time for a single system

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