This is quite a technical post on developing open badges, in particular focusing on badge validatation (which will clearly be required to check that a badge is genuine and issued from the issuer it says it's from to the issuee). You can see an example of what an open badge might look like and how verification might work.
"Last week I had the opportunity to work with Brian Brennan, who is the technical lead on Mozilla’s Open Badges project. One of the problems that interested me during the work week was validating open badges.
I built a demo that showed off in-browser verification of badges. I’d love to see the badge spec continue to evolve, and become even more robust. The next step is signing badges is going to ensure that they can’t be tampered with. It should be interesting to verify that inside the browser. It’d also be good to switch to the ‘iTXt’ PNG chunk, which is designed to hold international text, such as URLs."
Via DML Competition, grainnehamilton