Some time ago, I found myself using a Kryoflux interface and a couple of old floppy drives that had been kicking around in my workshop for a while to rip disk images of a colleague's floppy disk collection.  It took me a day or two of screwing around to figure out how to use the Kryoflux's software to make it do what I wanted.  Of course, I took notes along the way so that I would have something to refer back to later.  Recently, I decided that it would probably be helpful to people if I put those notes online …

20170107: It's not "group name" it's "Group ID."  I don't know how to find that yet.

The communications program Signal by Open Whisper Systems is unique in several respects.  Firstly, its barrier to entry is minimal.  You can search for it in the Google Play online store or Apple iOS appstore and it's waiting there for you at no cost.  Second, it's designed for security by default, i.e., you don't have to mess around with it to make it work, and it does does the right thing automatically and enforces strong encryption by default (unlike a lot of personal …