I realize this, but when I set my host file to use time.google.com’s IP address and try to run BTCapsule, it never starts. Which means I need to add another “Please enable internet” somewhere, but not opening at all is still enough to keep the private keys encrypted. When I change the IP address to my localhost, but keep time.google.com as the DNS, the program runs and alerts the user to turn on their internet.
you know that google uses more than one IP address and any binding to only a specific IP address (or several of them) is certainly not a good solution for something that needs to be used for 15 or more years. Also, add to all that the already large shortage of IPv4 addresses, and it is difficult to predict now in which direction that protocol will go in 20-30 years.
why did you get attached to Google times at all? maybe in 20 years, we won't live by that timer, it would be much more basic if you used a timestamp from the blockchain.