The article is attached to this email, but you can also find it at
http://arxiv.org/pdf/1410.6079v2.pdf.
I found an article by Alex Biryukov and Ivan Pustogarov that points out
how easy it would be to perform an attack on an SPV wallet (such as
Electrum) connected through the Tor network. I believe that bitcoin is
important to the Tails mission, so Tails should continue to support
Electrum, but we need to work towards a long-term solution to this
problem. So far, we have the SPV vulnerability documented in Tails 1.3.
For Tails 1.3.1, I am going to write some more documentation such as
waiting for block confirmations and how to transfer a watching-only
copy of a wallet to another computer.
