Ben Laurie blathering

Do We Need Credentica?

I read that IBM have finally contributed Idemix to Higgins.

But … I am puzzled. Everyone knows that the reason Idemix has not been contributed sooner is because it infringes the Credentica patents. At least, so says Stefan – I wouldn’t know, I haven’t checked. But it seems plausible that at least IBM think that’s true.

So, what’s changed? Have IBM decided that Idemix does not infringe? Or did Microsoft let them publish? Or what?

If its the former, then do others agree? And if its the latter, then in what sense is this open source? If IBM have some kind of special permission with regard to the patents, that is of no assistance to the rest of us.

It seems to me that someone needs to do some explaining. But if the outcome is that Idemix really is open source, then what is the relevance of Credentica?

Incidentally, I wanted to take a look at what it is that IBM have actually released, but there doesn’t seem to be anything there.


  1. Didn’t MS mention at the most recent EclipseCon that they were going to contribute something to Higgins? Maybe the contribution is a patent grant, or whatever.

    Comment by Patrick Mueller — 26 Apr 2008 @ 21:27

  2. There seems to be a downloadable version of Identity Mixer over here:

    Comment by Anonymous — 13 Nov 2009 @ 3:45

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