Launch codes aren’t to block China from authorizing a launch. They’re there to keep someone in the military from doing a launch without authorization. China is probably one of the parties who least wants said codes leaking.
If you have a couple hundred people who can start a nuclear war, that war becomes a whole lot more likely than if only one can.
From China’s standpoint, the next best number of people who can launch against them after 0 is 1.
The British used bicycle keys on their nuclear bombs.
Unless someone sends the suit with the codes in it to the Chinese dry cleaners…again…and again.
Launch codes aren’t to block China from authorizing a launch. They’re there to keep someone in the military from doing a launch without authorization. China is probably one of the parties who least wants said codes leaking.
If you have a couple hundred people who can start a nuclear war, that war becomes a whole lot more likely than if only one can.
From China’s standpoint, the next best number of people who can launch against them after 0 is 1.
The British used bicycle keys on their nuclear bombs.
http://news.bbc.co.uk/2/hi/7097101.stm
As people learned around that time, a really great way to bypass bicycle locks is with a ballpoint pen.
https://www.wired.com/2004/09/twist-a-pen-open-a-lock/
That was aimed more at keeping honest people honest.