Or, you know, it could be the NSA, since we've seen pictures of what they can do to a cisco router, and especially after the big web services made a push for TL

Or, you know, it could be the NSA, since we've seen pictures of what they can do to a cisco router, and especially after the big web services made a push for TLS everywhere. Does anyone more knowledgable know if this must be an at-the-factory thing, or if it's possible to do this afterwards, "interdiction" as the bloomberg story put it?