<s>
Garlic	B-Protocol
routing	I-Protocol
is	O
a	O
variant	O
of	O
onion	B-Protocol
routing	I-Protocol
that	O
encrypts	O
multiple	O
messages	O
together	O
to	O
make	O
it	O
more	O
difficult	O
for	O
attackers	O
to	O
perform	O
traffic	O
analysis	O
and	O
to	O
increase	O
the	O
speed	O
of	O
data	O
transfer	O
.	O
</s>
<s>
Michael	O
J	O
.	O
Freedman	O
defined	O
"	O
garlic	B-Protocol
routing	I-Protocol
"	O
as	O
an	O
extension	O
of	O
onion	B-Protocol
routing	I-Protocol
,	O
in	O
which	O
multiple	O
messages	O
are	O
bundled	O
together	O
.	O
</s>
<s>
He	O
called	O
each	O
message	O
a	O
"	O
bulb	O
"	O
,	O
whereas	O
I2P	B-Protocol
calls	O
them	O
"	O
garlic	O
cloves	O
"	O
.	O
</s>
<s>
This	O
allows	O
the	O
efficient	O
bundling	O
of	O
an	O
onion	B-Protocol
routing	I-Protocol
"	O
reply	O
block	O
"	O
with	O
the	O
original	O
message	O
.	O
</s>
<s>
Garlic	B-Protocol
routing	I-Protocol
is	O
one	O
of	O
the	O
key	O
factors	O
that	O
distinguishes	O
I2P	B-Protocol
from	O
Tor	B-Application
and	O
other	O
privacy	O
or	O
encryption	O
networks	O
.	O
</s>
<s>
"	O
Garlic	B-Protocol
routing	I-Protocol
"	O
was	O
first	O
coined	O
by	O
Michael	O
J	O
.	O
Freedman	O
in	O
Roger	O
Dingledine	O
's	O
Free	O
Haven	O
Master	O
's	O
thesis	O
Section	O
8.1.1	O
(	O
June	O
2000	O
)	O
,	O
as	O
derived	O
from	O
Onion	B-Protocol
Routing	I-Protocol
.	O
</s>
<s>
However	O
,	O
the	O
garlic	B-Protocol
routing	I-Protocol
implementation	O
in	O
I2P	B-Protocol
differs	O
from	O
the	O
design	O
proposed	O
by	O
Freedman	O
.	O
</s>
<s>
The	O
key	O
difference	O
is	O
that	O
garlic	B-Protocol
routing	I-Protocol
has	O
unidirectional	O
tunnels	O
,	O
whereas	O
mainstream	O
alternatives	O
like	O
Tor	B-Application
and	O
Mixmaster	B-Protocol
use	O
bidirectional	O
tunnels	O
.	O
</s>
<s>
One	O
potential	O
implementation	O
of	O
the	O
Garlic	B-Protocol
Routing	I-Protocol
protocol	O
is	O
shown	O
in	O
the	O
paper	O
,	O
Garlic	O
Cast	O
:	O
Lightweight	O
and	O
Decentralized	O
Anonymous	O
Content	O
Sharing	O
.	O
</s>
<s>
The	O
idea	O
is	O
to	O
provide	O
a	O
resilient	O
and	O
low	O
latency	O
anonymous	O
content	O
sharing	O
network	O
based	O
on	O
garlic	B-Protocol
routing	I-Protocol
.	O
</s>
<s>
The	O
distinguishing	O
benefit	O
that	O
makes	O
the	O
system	O
different	O
from	O
traditional	O
Tor	B-Application
networks	I-Application
is	O
that	O
it	O
is	O
designed	O
around	O
secure	O
,	O
fast	O
communication	O
.	O
</s>
<s>
This	O
is	O
made	O
possible	O
by	O
allowing	O
the	O
garlic	O
cast	O
system	O
to	O
use	O
random	O
walks	O
to	O
find	O
proxies	O
in	O
the	O
overlay	B-Architecture
network	I-Architecture
and	O
then	O
use	O
the	O
security-enhanced	O
Information	O
Dispersal	O
Algorithm	O
to	O
deliver	O
content	O
in	O
a	O
secure	O
and	O
fast	O
manner	O
.	O
</s>
