<s>
An	O
Identicon	B-Error_Name
is	O
a	O
visual	O
representation	O
of	O
a	O
hash	O
value	O
,	O
usually	O
of	O
an	O
IP	B-Protocol
address	I-Protocol
,	O
that	O
serves	O
to	O
identify	O
a	O
user	O
of	O
a	O
computer	O
system	O
as	O
a	O
form	O
of	O
avatar	B-Application
while	O
protecting	O
the	O
user	O
's	O
privacy	O
.	O
</s>
<s>
The	O
original	O
Identicon	B-Error_Name
was	O
a	O
9-block	O
graphic	O
,	O
and	O
the	O
representation	O
has	O
been	O
extended	O
to	O
other	O
graphic	O
forms	O
by	O
third	O
parties	O
.	O
</s>
<s>
Don	O
Park	O
came	O
up	O
with	O
the	O
Identicon	B-Error_Name
idea	O
on	O
January	O
18	O
,	O
2007	O
.	O
</s>
<s>
GitHub	O
uses	O
identicons	B-Error_Name
to	O
visually	O
differentiate	O
users	O
who	O
have	O
not	O
set	O
their	O
own	O
avatar	B-Application
.	O
</s>
<s>
Wikis	O
and	O
blogs	O
may	O
generate	O
identicons	B-Error_Name
to	O
visually	O
identify	O
authors	O
based	O
on	O
IP	B-Protocol
addresses	I-Protocol
.	O
</s>
<s>
Third-party	O
software	O
is	O
available	O
to	O
generate	O
identicons	B-Error_Name
for	O
the	O
purposes	O
of	O
identifying	O
eBay	O
sellers	O
.	O
</s>
<s>
The	O
original	O
Identicon	B-Error_Name
idea	O
has	O
been	O
expanded	O
to	O
include	O
a	O
couple	O
of	O
new	O
,	O
simple	O
yet	O
very	O
effective	O
,	O
anti-phishing	O
protection	O
schemes	O
.	O
</s>
<s>
There	O
is	O
an	O
add-on	B-Protocol
for	O
Firefox	B-Application
called	O
IdentFavIcon	O
Quantum	O
that	O
,	O
on	O
websites	O
without	O
favicons	O
,	O
replaces	O
them	O
in	O
the	O
tab	O
with	O
Identicons	B-Error_Name
based	O
on	O
the	O
IP	B-Protocol
address	I-Protocol
of	O
the	O
website	O
.	O
</s>
