<s>
.asec	B-Application
is	O
the	O
file	O
extension	O
of	O
an	O
Android	B-Application
secure	O
encrypted	O
(	O
ASEC	O
)	O
file	O
.	O
</s>
<s>
This	O
file	O
extension	O
is	O
specifically	O
associated	O
with	O
Google	B-Application
's	I-Application
Android	I-Application
operating	O
system	O
.	O
</s>
<s>
It	O
was	O
first	O
introduced	O
with	O
Android	B-Application
2.2	I-Application
(	O
code	O
name	O
Froyo	B-Application
)	O
in	O
May	O
2010	O
.	O
</s>
<s>
If	O
an	O
application	O
must	O
be	O
moved	O
from	O
memory	O
back	O
to	O
its	O
device	O
’s	O
local	O
storage	O
,	O
the	O
file	O
is	O
decrypted	O
from	O
the	O
ASEC	O
file	O
format	O
to	O
a	O
basic	O
APK	O
(	O
Android	B-Application
Package	O
)	O
file	O
format	O
.	O
</s>
