<s>
Client-side	B-Protocol
encryption	I-Protocol
is	O
the	O
cryptographic	O
technique	O
of	O
encrypting	O
data	O
on	O
the	O
sender	O
's	O
side	O
,	O
before	O
it	O
is	O
transmitted	O
to	O
a	O
server	B-Application
such	O
as	O
a	O
cloud	B-Application
storage	I-Application
service	I-Application
.	O
</s>
<s>
Client-side	B-Protocol
encryption	I-Protocol
features	O
an	O
encryption	O
key	O
that	O
is	O
not	O
available	O
to	O
the	O
service	O
provider	O
,	O
making	O
it	O
difficult	O
or	O
impossible	O
for	O
service	O
providers	O
to	O
decrypt	O
hosted	O
data	O
.	O
</s>
<s>
Client-side	B-Protocol
encryption	I-Protocol
allows	O
for	O
the	O
creation	O
of	O
applications	O
whose	O
providers	O
cannot	O
access	O
the	O
data	O
its	O
users	O
have	O
stored	O
,	O
thus	O
offering	O
a	O
high	O
level	O
of	O
privacy	O
.	O
</s>
<s>
Client-side	B-Protocol
encryption	I-Protocol
seeks	O
to	O
eliminate	O
the	O
potential	O
for	O
data	O
to	O
be	O
viewed	O
by	O
service	O
providers	O
(	O
or	O
third	O
parties	O
that	O
compel	O
service	O
providers	O
to	O
deliver	O
access	O
to	O
data	O
)	O
,	O
client-side	B-Protocol
encryption	I-Protocol
ensures	O
that	O
data	O
and	O
files	O
that	O
are	O
stored	O
in	O
the	O
cloud	O
can	O
only	O
be	O
viewed	O
on	O
the	O
client-side	O
of	O
the	O
exchange	O
.	O
</s>
<s>
By	O
remaining	O
encrypted	O
through	O
each	O
intermediary	O
server	B-Application
,	O
client-side	B-Protocol
encryption	I-Protocol
ensures	O
that	O
data	O
retains	O
privacy	O
from	O
the	O
origin	O
to	O
the	O
destination	O
server	B-Application
.	O
</s>
<s>
Current	O
academic	O
scholarship	O
as	O
well	O
as	O
recommendations	O
by	O
industry	O
professionals	O
provide	O
much	O
support	O
for	O
developers	O
to	O
include	O
client-side	B-Protocol
encryption	I-Protocol
to	O
protect	O
the	O
confidentiality	O
and	O
integrity	O
of	O
information	O
.	O
</s>
<s>
Examples	O
of	O
cloud	B-Application
storage	I-Application
services	I-Application
that	O
provide	O
client-side	B-Protocol
encryption	I-Protocol
are	O
Tresorit	B-Protocol
,	O
MEGA	O
and	O
SpiderOak	B-Operating_System
.	O
</s>
<s>
As	O
of	O
February	O
2016	O
,	O
neither	O
Apple	B-Application
iCloud	I-Application
,	O
or	O
Dropbox	B-Application
provide	O
client-side	B-Protocol
encryption	I-Protocol
.	O
</s>
<s>
Google	B-Application
Drive	I-Application
and	O
Google	B-Application
Docs	I-Application
released	O
client-side	B-Protocol
encryption	I-Protocol
in	O
2021	O
thereby	O
becoming	O
the	O
first	O
cloud	O
productivity	O
suite	O
ever	O
and	O
the	O
first	O
major	O
cloud	O
storage	O
platform	O
to	O
productionize	O
client-side	B-Protocol
encryption	I-Protocol
.	O
</s>
<s>
Google	O
followed	O
up	O
by	O
releasing	O
client-side	O
encrypted	O
versions	O
of	O
Google	B-Protocol
Meet	I-Protocol
,	O
Google	B-Application
Calendar	I-Application
,	O
and	O
Gmail	B-Application
.	O
</s>
