[aprssig] Password authentication

[Scott Miller]

> GRC has a good page for "Ultra High Security" passwords also.  It is 
> https://www.grc.com/passwords.htm.  Everytime the page refreshes it 
> displays a new set of three, 256 bit passwords.  They will never be 
> diplayed again (at least not in our/kids/grandkids lifetime).

Even better, check out HotBits - it uses a Geiger counter to get truly 
random numbers.  (I need to add that to my own Geiger project one of 
these days.)  This is where I got the values for the initialization 
vectors in my password system.

http://www.fourmilab.ch/hotbits/

Scott
N1VG