eduPersonTargetedID - how is it constructed?

Dick Visser visser at
Tue May 20 01:50:40 EDT 2014

The reason I'm asking is that I've recently had a case of an IdP that
moved from SimpleSAMLphp to Shib.
It seems that SSP and Shib use a similar way to generate ePTID (they
use a salt, entityid, and an attribute as input), but they're not
exactly the same. This causes the IDs to be different, so all accounts

I know it's still early, but eventually shifting IdPs will become a
more common scenario, so I was wondering how this can be solved.

Since both IdPs already have user bases, changing the current way of
generating IDs isn't an option. So I thought of a configuration option
in both SSP to make one behave like the other.

Any ideas?

and those drinks are a good idea!

On 19 May 2014 21:18, Peter Schober <peter.schober at> wrote:
> * Dick Visser <visser at> [2014-05-19 18:28]:
>> I'm looking for the piece of code that constructs the
>> eduPersonTargetedID.  Any idea where this is located?
> For the non-first value it's a type-4 UUID, IIRC.
> Why you're even asking that I'll ask you over a drink tomorrow,
> hopefully ;)
> -peter
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Dick Visser
System & Networking Engineer
TERENA Secretariat
Singel 468 D, 1017 AW Amsterdam
The Netherlands

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