The SOC in a raspi is probably no worse than the rest, but consider
   that the natural entropy available (for Crypto) to a SOC is much lower
   than a multi-component system like a laptop or tower. The Raspi 1.xx
   has an onboard entropy chip you can enable, if you trust it, and
   there'll be a new device in /dev you can read raw entropy from. Write
   that to /dev/random to seed the system pool and use /dev/urandom as
   your actual source.
   Personally I'd draw from several sources to feed /dev/random: an
   internal hash-chain (quick Python script) (re)seeded on a password and
   urandom periodically, the hardware entropy generator, Ubuntu's seed
   server.. don't trust one source, mash them up once a minute/hour and
   feed them to /dev/random.

   On 15 April 2015 09:18:11 GMT+01:00, Edd thompson <blukami@gmail.com>
   wrote:

     I am saving my pennies to build my pc that will be relatively secure
     and private.
     Raspberry pi b+
     Cell shield add on for above
     Prepaid sim (paid in cash)
     Bluetooth stick
     Wifi stick (looking for one with least security issues but they all
     seem to be in bed with Al-Shaitain)
     Lcd screen
     Sdr transceiver

     Punch the security holes that you see or possibly give me better
     substitutes
     Thanks for your time
     TTFN

   --
   Sent from my Android device with K-9 Mail. Please excuse my brevity.