[Muscle] How to pick AIDs?

Michael StJohns mstjohns at comcast.net
Thu Mar 13 15:11:55 PDT 2008


I'm writing a set of javacard applets and one of the pieces of data I needed was what AID/RID to select for my applets.  I *really* didn't want to go through the hassle of registering with whatever body gives out RIDs.

A little research revealed that AIDs starting with 'F' were reserved for proprietary assignments but that collisions might be possible.  I was going to need something that would have a small chance of collisions.

What I ended up selecting for my AID was "0xF0" prepended to the ASN1 encoding of a specific company's root object identifier as assigned by the Internet Assigned Numbers Authority..

E.g.  1.3.6.1.4.1.somenumber  or  F0 06 0A 2B 06 01 04 01 XX XX XX

Has anyone else come up with a different solution? 

One of the early questions I never asked was whether or not the musclecard applet AID was "legitimately" assigned?  

Mike



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