<s>
Fishbowl	B-Application
is	O
a	O
mobile	O
phone	O
architecture	O
developed	O
by	O
the	O
U.S.	O
National	O
Security	O
Agency	O
(	O
NSA	O
)	O
to	O
provide	O
a	O
secure	O
Voice	B-Application
over	I-Application
IP	I-Application
(	O
VoIP	B-Application
)	O
capability	O
using	O
commercial	O
grade	O
products	O
that	O
can	O
be	O
approved	O
to	O
communicate	O
classified	O
information	O
.	O
</s>
<s>
The	O
initial	O
version	O
was	O
implemented	O
using	O
Google	B-Application
's	I-Application
Android	I-Application
operating	B-General_Concept
system	I-General_Concept
,	O
modified	O
to	O
ensure	O
central	O
control	O
of	O
the	O
phone	O
's	O
configuration	O
at	O
all	O
times	O
.	O
</s>
<s>
To	O
minimize	O
the	O
chance	O
of	O
compromise	O
,	O
the	O
phones	O
use	O
two	O
layers	O
of	O
encryption	B-Protocol
protocols	I-Protocol
,	O
IPsec	B-Protocol
and	O
Secure	B-Protocol
Real-time	I-Protocol
Transport	I-Protocol
Protocol	I-Protocol
(	O
SRTP	O
)	O
,	O
and	O
employ	O
NSA	O
's	O
Suite	O
B	O
encryption	O
and	O
authentication	O
algorithms	O
.	O
</s>
<s>
USMobile	O
has	O
implemented	O
commercial	O
enterprise	O
version	O
of	O
Fishbowl	B-Application
technology	O
via	O
the	O
Scrambl3	B-Application
mobile	O
apps	O
that	O
run	O
on	O
both	O
Android	B-Application
and	O
iOS	O
platforms	O
.	O
</s>
