>>> What if two mobile hosts are communicating, moves simultaneously >>> and send "Migrate" messages to old (and, now invalid) addresses >>> of their peers? > >> Note that falling back to DNS updates means minutes of delay. > >Yes, if they move simultaneously, they will get minutes of delay (due >to DynDNS update), and the TCP session will break. BTW - delay can be reduced by using blockchain technologies - e.g. Ethereum, (being Bitcoin 2.0 platform) -- it has only 15 seconds of delay. Perhaps even few seconds. (for unconfirmed transactions) Ethereum is even more secure than Secure Dynamic DNS, because old transactions / bindings are world-visible. It will work, but requires small amount of money to change IP addresses (i.e. small amount of Ethereum on every mobile server or mobile node), and implement Ethereum protocol on mobile nodes. Also this approach is a *very* innovative and non-traditional one.