Thank you for your question. You don't ask easy ones, Mr. Clarke.
I'm not an expert in social insurance numbers or their use, but I can talk about identifiers. No matter what identifiers are used, whether they involve complex or simple cryptology, information management is always an issue and the potential for data theft always exists. It's a very complex issue, and I'm going to let the experts in social insurance numbers speak to your specific question.
The bigger problem, as I see it, is how identifiers are managed. They are key pieces of information, and learning how to manage them properly in the large security systems I was talking about earlier is crucial.