<s>
Mixminion	B-Protocol
is	O
the	O
standard	O
implementation	O
of	O
the	O
Type	O
III	O
anonymous	B-Application
remailer	I-Application
protocol	O
.	O
</s>
<s>
Mixminion	B-Protocol
can	O
send	O
and	O
receive	O
anonymous	O
e-mail	O
.	O
</s>
<s>
Mixminion	B-Protocol
uses	O
a	O
mix	O
network	O
architecture	O
to	O
provide	O
strong	O
anonymity	O
,	O
and	O
prevent	O
eavesdroppers	O
and	O
other	O
attackers	O
from	O
linking	O
senders	O
and	O
recipients	O
.	O
</s>
<s>
To	O
send	O
an	O
anonymous	O
message	O
,	O
mixminion	B-Protocol
breaks	O
it	O
into	O
uniform-sized	O
chunks	O
(	O
also	O
called	O
"	O
packets	O
"	O
)	O
,	O
pads	O
the	O
packets	O
to	O
a	O
uniform	O
size	O
,	O
and	O
chooses	O
a	O
path	O
through	O
the	O
mix	O
network	O
for	O
each	O
packet	O
.	O
</s>
<s>
The	O
software	O
encrypts	O
every	O
packet	O
with	O
the	O
public	B-Application
keys	I-Application
for	O
each	O
server	O
in	O
its	O
path	O
,	O
one	O
by	O
one	O
.	O
</s>
<s>
When	O
it	O
is	O
time	O
to	O
transmit	O
a	O
packet	O
,	O
mixminion	B-Protocol
sends	O
it	O
to	O
the	O
first	O
mix	O
in	O
the	O
path	O
.	O
</s>
<s>
Mixminion	B-Protocol
supports	O
Single-Use	O
Reply	O
Blocks	O
(	O
or	O
SURBs	O
)	O
to	O
allow	O
anonymous	O
recipients	O
.	O
</s>
<s>
The	O
most	O
current	O
version	O
of	O
Mixminion	B-Protocol
Message	O
Sender	O
is	O
1.2.7	O
and	O
was	O
released	O
on	O
11	O
February	O
2009	O
.	O
</s>
