<s>
The	B-Application
Update	I-Application
Framework	I-Application
(	O
TUF	O
)	O
is	O
a	O
software	B-Architecture
framework	I-Architecture
designed	O
to	O
protect	O
mechanisms	O
that	O
automatically	O
identify	O
and	O
download	O
updates	O
to	O
software	O
.	O
</s>
<s>
In	O
this	O
way	O
,	O
it	O
protects	O
software	B-Application
repositories	I-Application
,	O
which	O
are	O
an	O
increasingly	O
desirable	O
target	O
for	O
hackers	O
.	O
</s>
<s>
The	O
design	O
of	O
TUF	O
acknowledges	O
that	O
all	O
software	B-Application
repositories	I-Application
will	O
likely	O
be	O
compromised	O
at	O
some	O
point	O
,	O
so	O
any	O
security	O
strategy	O
must	O
be	O
prepared	O
for	O
that	O
scenario	O
.	O
</s>
<s>
This	O
strategy	O
of	O
“	O
compromise-resilience	O
”	O
improves	O
on	O
existing	O
methods	O
based	O
on	O
keysigning	B-General_Concept
by	O
incorporating	O
techniques	O
,	O
such	O
as	O
separation	O
of	O
signing	O
duties	O
and	O
setting	O
a	O
threshold	O
number	O
of	O
required	O
signatures	O
.	O
</s>
<s>
One	O
of	O
the	O
more	O
significant	O
earlier	O
adoptions	O
of	O
TUF	O
in	O
the	O
open-source	B-License
community	O
was	O
by	O
Docker	O
Content	O
Trust	O
,	O
an	O
implementation	O
of	O
the	O
Notary	O
project	O
from	O
Docker	O
that	O
deploys	O
Linux	O
containers	O
.	O
</s>
<s>
It	O
has	O
been	O
independently	O
implemented	O
in	O
the	O
Go	O
language	O
by	O
Flynn	O
,	O
an	O
open-source	B-License
platform	O
as	O
a	O
service	O
(	O
PaaS	O
)	O
for	O
running	O
applications	O
in	O
production	O
.	O
</s>
<s>
Implementations	O
of	O
TUF	O
have	O
also	O
been	O
written	O
in	O
Haskell	O
,	O
Ruby	B-Language
and	O
Rust	B-Application
.	O
</s>
<s>
A	O
Rust	B-Application
version	O
called	O
Tough	O
was	O
created	O
by	O
Amazon	O
Web	O
Services	O
Labs	O
for	O
use	O
with	O
on-demand	O
cloud	O
computing	O
platforms	O
and	O
APIs	O
.	O
</s>
<s>
Google	O
has	O
also	O
implemented	O
a	O
version	O
of	O
TUF	O
to	O
secure	O
its	O
open	B-License
source	I-License
operating	O
system	O
,	O
Fuchsia	O
.	O
</s>
<s>
In	O
2017	O
,	O
an	O
adaptation	O
of	O
this	O
technology	O
called	O
Uptane	B-Application
,	O
designed	O
to	O
protect	O
computing	O
units	O
on	O
automobiles	O
,	O
was	O
named	O
one	O
of	O
the	O
top	O
security	O
inventions	O
for	O
2017	O
by	O
Popular	O
Science	O
.	O
</s>
