<s>
A	O
smart	B-Device
lock	I-Device
is	O
an	O
electromechanical	O
lock	O
that	O
is	O
designed	O
to	O
perform	O
locking	O
and	O
unlocking	O
operations	O
on	O
a	O
door	O
when	O
it	O
receives	O
a	O
prompt	O
via	O
an	O
electronic	O
keypad	O
,	O
biometric	O
sensor	O
,	O
access	O
card	O
,	O
Bluetooth	O
,	O
or	O
Wi-FI	O
from	O
a	O
registered	O
mobile	O
device	O
.	O
</s>
<s>
These	O
locks	O
are	O
called	O
smart	B-Device
locks	I-Device
because	O
they	O
use	O
advanced	O
technology	O
and	O
Internet	O
communication	O
to	O
enable	O
easier	O
access	O
for	O
users	O
and	O
enhanced	O
security	O
from	O
intruders	O
.	O
</s>
<s>
The	O
main	O
components	O
of	O
the	O
smart	B-Device
lock	I-Device
include	O
the	O
physical	O
lock	O
,	O
the	O
key	O
(	O
which	O
can	O
be	O
electronic	O
,	O
digitally	O
encrypted	O
,	O
or	O
a	O
virtual	O
key	O
to	O
provide	O
keyless	O
entry	O
)	O
,	O
a	O
secure	O
Bluetooth	O
or	O
Wi-Fi	O
connection	O
,	O
and	O
a	O
management	O
mobile	O
app	O
.	O
</s>
<s>
Smart	B-Device
locks	I-Device
may	O
also	O
monitor	O
access	O
and	O
send	O
alerts	O
in	O
response	O
to	O
the	O
different	O
events	O
it	O
monitors	O
as	O
well	O
as	O
other	O
critical	O
events	O
related	O
to	O
the	O
status	O
of	O
the	O
device	O
.	O
</s>
<s>
Smart	B-Device
locks	I-Device
can	O
be	O
considered	O
part	O
of	O
a	O
smart	B-Device
home	I-Device
.	O
</s>
<s>
Most	O
smart	B-Device
locks	I-Device
are	O
installed	O
on	O
mechanical	O
locks	O
(	O
simple	O
types	O
of	O
locks	O
,	O
including	O
deadbolts	B-Application
)	O
and	O
they	O
physically	O
upgrade	O
the	O
ordinary	O
lock	O
.	O
</s>
<s>
Smart	B-Device
locks	I-Device
,	O
like	O
the	O
traditional	O
locks	O
,	O
need	O
two	O
main	O
parts	O
to	O
work	O
:	O
the	O
lock	O
and	O
the	O
key	O
.	O
</s>
<s>
In	O
the	O
case	O
of	O
these	O
electronic	O
locks	O
,	O
the	O
key	O
is	O
not	O
a	O
physical	O
key	O
but	O
a	O
smartphone	B-Application
or	O
a	O
special	O
key	O
fob	O
or	O
keycard	O
configured	O
explicitly	O
for	O
this	O
purpose	O
which	O
wirelessly	O
performs	O
the	O
authentication	O
needed	O
to	O
automatically	O
unlock	O
the	O
door	O
.	O
</s>
<s>
Smart	B-Device
locks	I-Device
allow	O
users	O
to	O
grant	O
access	O
to	O
a	O
third	O
party	O
by	O
means	O
of	O
a	O
virtual	O
key	O
.	O
</s>
<s>
This	O
key	O
can	O
be	O
sent	O
to	O
the	O
recipient	O
smartphone	B-Application
over	O
standard	O
messaging	O
protocols	O
such	O
as	O
e-mail	O
or	O
SMS	B-Device
,	O
or	O
via	O
a	O
dedicated	O
application	O
.	O
</s>
<s>
Once	O
this	O
key	O
is	O
received	O
the	O
recipient	O
will	O
be	O
able	O
to	O
unlock	O
the	O
smart	B-Device
lock	I-Device
using	O
their	O
mobile	O
device	O
during	O
the	O
timeframe	O
previously	O
specified	O
by	O
the	O
sender	O
.	O
</s>
<s>
Certain	O
smart	B-Device
locks	I-Device
include	O
a	O
built-in	O
Wi-Fi	O
connection	O
that	O
allows	O
for	O
monitoring	O
features	O
such	O
as	O
access	O
notifications	O
or	O
cameras	O
to	O
show	O
the	O
person	O
requesting	O
access	O
.	O
</s>
<s>
Some	O
smart	B-Device
locks	I-Device
work	O
with	O
a	O
smart	O
doorbell	O
to	O
allow	O
the	O
user	O
to	O
see	O
who	O
and	O
when	O
someone	O
is	O
at	O
a	O
door	O
.	O
</s>
<s>
Many	O
smart	B-Device
locks	I-Device
now	O
also	O
feature	O
biometric	O
features	O
,	O
such	O
as	O
fingerprint	O
sensors	O
.	O
</s>
<s>
Smart	B-Device
locks	I-Device
may	O
use	O
Bluetooth	B-General_Concept
Low	I-General_Concept
Energy	I-General_Concept
and	O
SSL	B-Protocol
to	O
communicate	O
,	O
encrypting	O
communications	O
using	O
128/256	O
-bit	O
AES	B-Algorithm
.	O
</s>
<s>
Industrial	O
smart	B-Device
locks	I-Device
(	O
passive	O
electronic	O
lock	O
)	O
are	O
a	O
branch	O
of	O
the	O
smart	B-Device
lock	I-Device
field	O
.	O
</s>
<s>
They	O
are	O
an	O
iterative	O
product	O
of	O
mechanical	O
locks	O
like	O
smart	B-Device
locks	I-Device
.	O
</s>
<s>
However	O
,	O
the	O
application	O
areas	O
of	O
industrial	O
smart	B-Device
locks	I-Device
are	O
not	O
smart	B-Device
homes	I-Device
,	O
but	O
fields	O
that	O
have	O
extremely	O
high	O
requirements	O
for	O
key	O
management	O
,	O
such	O
as	O
communications	O
,	O
power	O
utilities	O
,	O
water	O
utilities	O
,	O
public	O
safety	O
,	O
transportation	O
,	O
data	O
centers	O
,	O
etc	O
.	O
</s>
<s>
Industry	O
smart	B-Device
locks	I-Device
mainly	O
have	O
three	O
components	O
:	O
locks	O
and	O
keys	O
,	O
and	O
management	O
systems	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
,	O
industry	O
smart	B-Device
locks	I-Device
can	O
also	O
remotely	O
assign	O
permissions	O
through	O
mobile	O
app	O
.	O
</s>
