Computer Handyman

I have had two brushes with Vietnam during my life: one was serving in the Army artillery in Vietnam during the war, the second was overseeing databases of Vietnamese who wanted to go to the United States after the war.  When I was in Vietnam from 1969 to 1970, I had very little interaction with the Vietnamese. I was in a heavy artillery battery that supported American Army soldiers on the ground.   Most of the time we were stationed at firebases in the middle of nowhere, with no Vietnamese around.   A few times we had Vietnamese units on the same firebase, but we did not interact.   They supported Vietnamese units and we supported American units.   We were in northern South Vietnam, which the Army called I Corps.   Occasionally I would ride into town with supply trucks; so, I occasionally saw Hue and Quang Tri. At Firebase Barbara, on a lonely mountaintop not too far south of Khe Sanh on the Laotian border, all of our resupply was done by helicopter. ...

Cybercurrencies are here to stay.  Maybe Bitcoin is too, but not at the levels it currently holds.  Tulips are still here, but the tulip mania of the 1630s has passed.  Bitcoin was originally intended to be a medium of exchange that would be insulated from almost all external control.  This anonymity made it an excellent means of exchange for illegal activities, most recently illustrated by the fact that most of the ransomware attacks on private data have demanded payment in Bitcoin.  Bitcoin transactions are recorded by blockchain, which is like an old accounting ledger.   It contains every Bitcoin transaction, although looking at blockchain from the outside, you can tell that a transaction is verified, but you cannot tell who the parties were or how much Bitcoin was involved.   As one of the parties to the transaction, however, you can pull out the specific information.   So, if Elon Musk for example says you never paid him for your Tesla, y...