<s>
In	O
computer	O
security	O
,	O
macaroons	B-General_Concept
are	O
authorization	O
credentials	O
that	O
support	O
decentralized	O
delegation	O
between	O
principals	O
.	O
</s>
<s>
Macaroons	B-General_Concept
are	O
used	O
in	O
a	O
variety	O
of	O
systems	O
,	O
including	O
the	O
Ubuntu	B-Application
Snappy	I-Application
package	I-Application
manager	I-Application
,	O
the	O
HyperDex	O
data	O
store	O
,	O
the	O
Matrix	B-Protocol
communication	I-Protocol
protocol	I-Protocol
,	O
and	O
the	O
Python	B-Language
Package	I-Language
Index	I-Language
.	O
</s>
<s>
Macaroons	B-General_Concept
are	O
similar	O
to	O
some	O
other	O
technologies	O
.	O
</s>
<s>
Compared	O
to	O
JSON	B-General_Concept
Web	I-General_Concept
Token	I-General_Concept
(	O
JWT	O
)	O
:	O
</s>
<s>
Implementations	O
need	O
to	O
decide	O
whether	O
the	O
entire	O
macaroon	O
tree	O
is	O
invalidated	O
at	O
once	O
from	O
its	O
root	O
,	O
the	O
server	O
secret	O
key	O
;	O
or	O
if	O
intermediate	O
macaroons	B-General_Concept
are	O
to	O
be	O
blacklisted	O
,	O
comparable	O
to	O
time-bound	O
JWT	O
's	O
.	O
</s>
