<s>
A	O
Java	B-Language
KeyStore	I-Language
(	O
JKS	O
)	O
is	O
a	O
repository	B-Protocol
of	O
security	O
certificates	O
either	O
authorization	O
certificates	O
or	O
public	B-Application
key	I-Application
certificates	O
plus	O
corresponding	O
private	B-Application
keys	I-Application
,	O
used	O
for	O
instance	O
in	O
TLS	B-Protocol
encryption	I-Protocol
.	O
</s>
<s>
In	O
IBM	B-Language
WebSphere	I-Language
Application	I-Language
Server	I-Language
and	O
Oracle	B-Language
WebLogic	I-Language
Server	I-Language
,	O
a	O
file	O
with	O
extension	O
jks	O
serves	O
as	O
a	O
keystore	B-Language
.	O
</s>
<s>
The	O
Java	B-Language
Development	I-Language
Kit	I-Language
maintains	O
a	O
CA	B-Architecture
keystore	B-Language
file	O
named	O
cacerts	O
in	O
folder	O
jre/lib/security	O
.	O
</s>
<s>
JDKs	B-Language
provide	O
a	O
tool	O
named	O
keytool	B-Language
to	O
manipulate	O
the	O
keystore	B-Language
.	O
</s>
<s>
keytool	B-Language
has	O
no	O
functionality	O
to	O
extract	O
the	O
private	B-Application
key	I-Application
out	O
of	O
the	O
keystore	B-Language
,	O
but	O
this	O
is	O
possible	O
with	O
third-party	O
tools	O
like	O
jksExportKey	O
,	O
CERTivity	O
,	O
Portecle	O
and	O
KeyStore	B-Language
Explorer	O
.	O
</s>
