Cool idea but I'm not buying the justification. There are many cases where the correct response to "but law enforcement needs a way in" is "we have a system for that, it's called a warrant."
Further, while standing somewhere for five minutes may be obvious in some situations, there are many cases in which it wouldn't be obvious at all, or the response time would be great enough that this could still be quite useful to bad guys.
Finally, "security through counting on slow hardware" is probably even worse than security through obscurity.
Further, while standing somewhere for five minutes may be obvious in some situations, there are many cases in which it wouldn't be obvious at all, or the response time would be great enough that this could still be quite useful to bad guys.
Finally, "security through counting on slow hardware" is probably even worse than security through obscurity.