This post is a good candidate for RTFM comments. Identification the FM to read would be appreciated
On another post, I've asked about building a bitcoin miner using Udoo Quads. I'm sure that (eventually) that project can be setup to accept ssh logins in a secure manner. My provider is Verizon and I have a couple of ellipsis 7 tablets to use as remote clients. Having secured the server end, the problem is to secure the remote client. I can write Android apps and root the tablet if necessary. I do not trust the tablet or network to be secure.

Any help for the truly paranoid?

Thanks to all who responded to my previous post. Here is where I am now. Any comments, suggestions, or recommendations appreciated.

My grandson bought some ASIC mining hardware that he attached to his computer. But it has a noisy fan and gets in the way of his game playing. Also he keeps downloading viruses.
 To help him learn some security and computer science while supporting his mining interest.

My idea is to attach his hardware to a Udoo Quad which could be left running off in a corner somewhere. I need to learn a lot about bitcoin or he will get frustrated and give up. So far I've gotten bitcoin core to build and bitcoin-qt to run with the following results :
a) It uses all the RAM and an additional 750+ Mb swap;
b) It uses about 26% of one core;
c) It might work for managing one wallet, but is too slow for anything else.
d) Power consumption is minimal

The next step for me is to join the Udoo up with some mining hardware and get that running.  This go-around the hardware should be cheap, but good enough to keep the kid interested. He can spend his own money to buy expensive hardware

Any suggestions?

My grandson is trying to get started mining bitcoins using hardware attached to his gaming computer. He has no idea about security.
I've started a learning project by building bitcoin core 0.9.2 on a Udoo Quad with attached drive. My plan is to run as a GPU miner until he learns enough linux and security process', then get more hardware. Ultimately the Udoo would hide  behind the tv and run 24-7.

0.9.2 is very slow. It has been "synchronizing with the network" for 3 days now. CPU usage seems to average between 5% and 12%. It was built using the default setup.sh-configure-make-make install route.

Any idea why it is so slow?

Also any suggestions as to which hardware to use with the Udoo would be welcomed.