It is reported that the SACCS strategic automatic command and control system of the U.S. military is related to the U.S. nuclear launch system.The system is based on IBM Series / 1 computer of IBM Company in 1970s.In 2005, it has been in use for more than 40 years and is still using 8-inch floppy drives, which have always been used by field forces to send emergency action messages at a critical moment.
The United States has been discussing replacing the ancient system with a new computer system since 2016, and now a colonel in the United States said in an interview that they had finally eliminated the 8-inch floppy drive and upgraded the drive to a "highly secure solid-state digital storage solution" (is it an encrypted U disk?)
However, the 8-inch floppy drive lags behind, but it has been very reliable and secure for many years. It can't be cracked at all, because "it came out before the invention of the Internet. You can't crack something without an IP address. It's a unique system, old and secure."