<s>
Critical	B-Architecture
Internet	I-Architecture
infrastructure	I-Architecture
is	O
a	O
collective	O
term	O
for	O
all	O
hardware	O
and	O
software	O
systems	O
that	O
constitute	O
essential	O
components	O
in	O
the	O
operation	O
of	O
the	O
Internet	O
.	O
</s>
<s>
Several	O
studies	O
and	O
events	O
have	O
helped	O
to	O
define	O
the	O
scope	O
of	O
critical	B-Architecture
Internet	I-Architecture
infrastructure	I-Architecture
.	O
</s>
<s>
In	O
August	O
2013	O
,	O
Internet	B-Architecture
infrastructure	I-Architecture
experts	O
including	O
Yuval	O
Shavitt	O
,	O
Bill	O
Woodcock	O
,	O
Rossella	O
Mattioli	O
,	O
Thomas	O
Haeberlen	O
,	O
Ethan	O
Katz-Bassett	O
and	O
Roland	O
Dobbins	O
convened	O
for	O
six	O
days	O
at	O
Schloss	O
Dagstuhl	O
to	O
refine	O
the	O
academic	O
and	O
policy	O
understanding	O
of	O
critical	B-Architecture
Internet	I-Architecture
infrastructure	I-Architecture
,	O
producing	O
a	O
number	O
of	O
papers	O
in	O
the	O
process	O
.	O
</s>
<s>
In	O
2017	O
,	O
the	O
Global	O
Commission	O
on	O
the	O
Stability	O
of	O
Cyberspace	O
undertook	O
a	O
global	O
survey	O
of	O
Internet	B-Architecture
infrastructure	I-Architecture
experts	O
in	O
order	O
to	O
assess	O
the	O
degree	O
of	O
consensus	O
on	O
what	O
constituted	O
critical	B-Architecture
Internet	I-Architecture
infrastructure	I-Architecture
,	O
producing	O
a	O
Definition	O
of	O
the	O
Public	O
Core	O
which	O
has	O
since	O
been	O
used	O
by	O
the	O
OECD	O
and	O
others	O
as	O
a	O
standardized	O
description	O
of	O
the	O
principal	O
elements	O
of	O
Internet	O
critical	O
infrastructure	O
.	O
</s>
<s>
In	O
addition	O
to	O
these	O
globally-applicable	O
findings	O
,	O
nationally-specific	O
definitions	O
have	O
been	O
made	O
by	O
individual	O
governments	O
,	O
for	O
example	O
by	O
the	O
US	O
Government	O
Accountability	O
Office	O
in	O
2006	O
and	O
the	O
US	O
White	B-Application
House	I-Application
in	O
2013	O
.	O
</s>
<s>
The	O
report	O
of	O
the	O
GCSC	O
Critical	O
Infrastructure	O
Assessment	O
Working	O
Group	O
has	O
summarized	O
the	O
results	O
of	O
their	O
survey	O
in	O
a	O
comprehensive	O
definition	O
of	O
Critical	B-Architecture
Internet	I-Architecture
infrastructure	I-Architecture
,	O
which	O
includes	O
the	O
following	O
elements	O
:	O
</s>
