<s>
Peer-to-peer	O
direct	O
and	O
anonymous	O
distribution	O
overlay	O
(	O
P2PRIV	B-Architecture
)	O
was	O
a	O
conceptual	O
anonymous	O
peer-to-peer	O
overlay	B-Architecture
network	I-Architecture
introduced	O
at	O
Warsaw	O
University	O
of	O
Technology	O
in	O
2007	O
.	O
</s>
<s>
P2PRIV	B-Architecture
hides	O
an	O
initiator	O
of	O
communications	O
by	O
a	O
parallelization	O
of	O
network	O
nodes	O
receiving	O
or	O
sending	O
user	O
data	O
independently	O
.	O
</s>
<s>
This	O
concept	O
is	O
contrary	O
to	O
other	O
anonymity	B-Application
networks	I-Application
topologies	O
.	O
</s>
<s>
The	O
anonymity	B-Application
networks	I-Application
employ	O
a	O
serial	O
communication	O
as	O
a	O
common	O
basis	O
and	O
hide	O
the	O
initiator	O
in	O
a	O
cascade	O
of	O
network	O
nodes	O
forwarding	O
user	O
data	O
consecutively	O
.	O
</s>
<s>
The	O
main	O
advantage	O
of	O
P2PRIV	B-Architecture
is	O
viewed	O
as	O
a	O
possibility	O
of	O
providing	O
high-speed	O
anonymous	O
data	O
transfer	O
while	O
anonymous	O
data	O
can	O
be	O
sent	O
directly	O
and	O
independently	O
in	O
the	O
distributed	O
network	O
.	O
</s>
<s>
P2PRIV	B-Architecture
separates	O
anonymization	O
from	O
user	O
data	O
transport	O
.	O
</s>
<s>
Mix	B-Protocol
network	I-Protocol
and	O
Crowds	B-Protocol
 '	O
Random	O
walk	O
algorithm	O
)	O
are	O
utilized	O
in	O
hiding	O
the	O
initiator	O
of	O
the	O
CC	O
.	O
</s>
<s>
A	O
process	O
of	O
finding	O
the	O
true	O
initiator	O
among	O
network	O
nodes	O
is	O
hard	O
to	O
perform	O
even	O
for	O
an	O
adversary	O
able	O
to	O
collude	O
a	O
significant	O
part	O
of	O
overlay	B-Architecture
network	I-Architecture
.	O
</s>
<s>
P2PRIV	B-Architecture
requires	O
a	O
fully	O
distributed	O
network	O
with	O
distributed	O
information	O
content	O
to	O
assure	O
high-anonymous	O
access	O
to	O
its	O
resources	O
.	O
</s>
<s>
A	O
utility	O
of	O
P2PRIV	B-Architecture
in	O
client-server	O
like	O
services	O
,	O
e.g.	O
,	O
World	O
Wide	O
Web	O
system	O
,	O
or	O
in	O
hybrid	O
P2P	O
topologies	O
,	O
is	O
problematic	O
in	O
its	O
current	O
form	O
.	O
</s>
