<s>
Gridcoin	B-Operating_System
(	O
Abbreviation	O
:	O
GRC	O
)	O
is	O
an	O
open	O
source	O
cryptocurrency	O
which	O
securely	O
rewards	O
volunteer	B-Operating_System
computing	I-Operating_System
performed	O
on	O
the	O
BOINC	B-Operating_System
network	O
.	O
</s>
<s>
Originally	O
developed	O
to	O
support	O
SETI	B-Application
@home	I-Application
,	O
it	O
became	O
the	O
platform	O
for	O
many	O
other	O
applications	O
in	O
areas	O
as	O
diverse	O
as	O
medicine	O
,	O
molecular	O
biology	O
,	O
mathematics	O
,	O
linguistics	O
,	O
climatology	O
,	O
environmental	O
science	O
,	O
and	O
astrophysics	O
.	O
</s>
<s>
Gridcoin	B-Operating_System
requires	O
a	O
significant	O
level	O
of	O
skill	O
in	O
order	O
to	O
begin	O
"	O
crunching	O
"	O
.	O
</s>
<s>
Despite	O
this	O
Gridcoin	B-Operating_System
's	O
ability	O
to	O
monetise	O
idle	O
computing	O
time	O
,	O
"	O
crunching	O
"	O
can	O
modestly	O
help	O
with	O
reducing	O
digital	O
divide	O
.	O
</s>
<s>
Gridcoin	B-Operating_System
,	O
initially	O
using	O
the	O
energy	O
intensive	O
proof	O
of	O
work	O
-	O
as	O
used	O
by	O
Bitcoin	B-Protocol
,	O
before	O
migrating	O
to	O
a	O
proof	B-Protocol
of	I-Protocol
stake	I-Protocol
protocol	O
in	O
2014	O
,	O
similar	O
to	O
Peercoin	B-Protocol
,	O
in	O
an	O
attempt	O
to	O
address	O
the	O
environmental	O
impact	O
of	O
cryptocurrency	O
mining	O
.	O
</s>
<s>
An	O
exploit	O
was	O
demonstrated	O
in	O
August	O
2017	O
that	O
revealed	O
the	O
emails	O
of	O
Gridcoin	B-Operating_System
users	O
and	O
allowed	O
the	O
theft	O
of	O
other	O
users	O
work	O
.	O
</s>
<s>
The	O
implementation	O
Gridcoin-Research	O
was	O
created	O
as	O
a	O
fork	O
of	O
Bitcoin	B-Protocol
and	O
Peercoin	B-Protocol
and	O
is	O
licensed	O
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
It	O
uses	O
Qt	O
5	O
for	O
its	O
user	O
interface	O
and	O
prebuilt	O
executables	B-Application
of	O
the	O
wallet	O
are	O
distributed	O
for	O
Windows	O
,	O
macOS	B-Application
,	O
and	O
Debian	O
.	O
</s>
