Quote from: FatFork on Today at 08:03:34 AM

Quote from: BTCapsule on Today at 07:52:11 AM

Quote from: PrivatePerson on October 10, 2022, 09:19:51 AM

If you set up a time server on a local PC and register a redirect from the specified domains, will your capsule open?

I had no idea how to do this, but after many hours of learning, I successfully set up a local time server, edited my host file, and was able to unlock the keys by changing the system clock.

This has now been fixed. Please see the updated code at:

https://github.com/BTCapsule/BTCapsule

Now when requesting the date from time.google.com, BTCapsule checks the IP address. If the IP address in the host file is pointed to the localhost, BTCapsule alerts the user to enable their internet. If the IP address in the host file is pointed to the IP of time.google.com, and the computer is offline, the program fails to run.

I'm afraid that won't be enough. Anyone can set up a fake NTP server on any host, not just the local computer. In addition, it is possible to redirect Internet traffic without using the hosts file, for example, at the router level or by spoofing DNS records.

If someone sets up a fake NTP server, would they be able to replicate time.google.com’s IP address? Here is the code:

def get_ntp_time() -> datetime:
         try:
            ntp_pool = 'time.google.com'
            ip = socket.gethostbyname(ntp_pool)
            ip1 = ip[:-2]
            ip2 = ip[:-3]


            if (ip1 == "216.239.35" or ip2 == "216.239.35"):
               call = ntplib.NTPClient()
               response = call.request(ntp_pool, version = 3)

            else:
               canvas1 = tk.Canvas(root, width = 400,
                  height = 240,
                  bg = 'white',
                  highlightthickness=0
                  )

               canvas1.pack()

               canvas1.create_text(200,110,
                  width= 350,

                  fill="black",
                  font="Arial 10",
                  text="Please enable internet")

               root.title('Bitcoin Time Capsule')


               root.mainloop()
               quit()