<p>Bitcoin is a incredible use of peer to peer communication and
encryption, allowing direct and immediate money transfer without any
central control. It is sometimes claimed to be ideal for illegal
-activity, which I believe is quite a long way from the truth. At last
+activity, which I believe is quite a long way from the truth. At least
I would not conduct illegal money transfers using a system where the
-details of every transaction is kept forever. This point is
+details of every transaction are kept forever. This point is
investigated in an peer reviewed article in
<a href="https://www.usenix.org/publications/login">USENIX ;login:</a>
from December 2013, in the article