Being fast with a fire extinguisher is no substitute for fire prevention :-)
The point about all security models is that you need multiple redundant systems not one silver bullet. My house is built to fire safety codes, the materials are tested and approved individually, we have fire alarms, fire extinguishers, a fire hydrant nearby and a fire department to use it, and we have fire insurance. Most houses are like this and houses still burn down.
Shipley's argument is that code signing is all you need. It's not quite the same as advocating fire extinguishers as the only line of defense against house fire, more like simply relying on your builder's credentials.
The point about all security models is that you need multiple redundant systems not one silver bullet. My house is built to fire safety codes, the materials are tested and approved individually, we have fire alarms, fire extinguishers, a fire hydrant nearby and a fire department to use it, and we have fire insurance. Most houses are like this and houses still burn down.
Shipley's argument is that code signing is all you need. It's not quite the same as advocating fire extinguishers as the only line of defense against house fire, more like simply relying on your builder's credentials.