<s>
UMLsec	B-Language
is	O
an	O
extension	O
to	O
the	O
Unified	B-Language
Modelling	I-Language
Language	I-Language
for	O
integrating	O
security	O
related	O
information	O
in	O
UML	B-Language
specifications	O
.	O
</s>
<s>
UMLsec	B-Language
is	O
defined	O
as	O
lightweight	O
extension	O
for	O
UML	B-Language
.	O
</s>
<s>
UMLsec	B-Language
defines	O
21	O
stereotypes	O
listed	O
below	O
.	O
</s>
<s>
In	O
UMLsec	B-Language
,	O
the	O
attacker	O
model	O
is	O
defined	O
through	O
the	O
threats	O
that	O
it	O
poses	O
.	O
</s>
