<s>
Kenzero	B-Application
is	O
a	O
computer	O
trojan	O
that	O
is	O
spread	O
across	O
peer-to-peer	O
networks	O
and	O
is	O
programmed	O
to	O
monitor	O
the	O
browsing	O
history	O
of	O
victims	O
.	O
</s>
<s>
The	O
Kenzero	B-Application
trojan	O
was	O
first	O
discovered	O
on	O
the	O
November	O
27	O
,	O
2009	O
,	O
but	O
researchers	O
think	O
it	O
went	O
undetected	O
for	O
a	O
few	O
months	O
prior	O
to	O
the	O
initial	O
discovery	O
.	O
</s>
<s>
Kenzero	B-Application
attacks	O
computers	O
that	O
download	O
files	O
through	O
peer-to-peer	O
networks	O
(	O
P2P	O
)	O
.	O
</s>
