We can carry on talking till the Olympics are over, but if the industry is to avoid shut down we need to agree an alternative and put it up.
Topto bottom is quite right. I visit military bases every year, and have to provide my name, address and passport number for vetting in advance. They also want my registration and radio contact inbound. If this is OK to fly into an operational base in the middle of a war, why wont it suffice for the Olympics!!!!???
We have over a year for this to be done for anyone not already vetted, and the successful vettee could then be given a security number. On first contact you provide registration and security number - having to provide a combination no doubt makes the spooks even more happy, if no more safe.
No doubt the 'temporary' measures may be as temporary as income tax, but that is another matter