Thanks. Didn't know it was illegal to record it in the US - or does that vary by State? There's a bunch of ways to achieve this privately. The work of Jan Ca

Thanks. Didn't know it was illegal to record it in the US - or does that vary by State? There's a bunch of ways to achieve this privately. The work of Jan Camenisch on Anonymous Credentials and other things was done quite a long time ago now. It's a well studied field.