<s>
The	O
System	B-Protocol
Security	I-Protocol
Services	I-Protocol
Daemon	I-Protocol
(	O
SSSD	O
)	O
is	O
software	O
originally	O
developed	O
for	O
the	O
Linux	B-Application
operating	I-Application
system	I-Application
(	O
OS	O
)	O
that	O
provides	O
a	O
set	O
of	O
daemons	B-Operating_System
to	O
manage	O
access	O
to	O
remote	O
directory	O
services	O
and	O
authentication	O
mechanisms	O
.	O
</s>
<s>
The	O
beginnings	O
of	O
SSSD	O
lie	O
in	O
the	O
open-source	B-Application
software	I-Application
project	O
FreeIPA	B-Language
(	O
Identity	O
,	O
Policy	O
and	O
Audit	O
)	O
.	O
</s>
<s>
It	O
is	O
intended	O
to	O
provide	O
single	O
sign-on	O
capabilities	O
to	O
networks	O
based	O
on	O
Unix-like	B-Operating_System
OSs	O
that	O
are	O
similar	O
in	O
effect	O
to	O
the	O
capabilities	O
provided	O
by	O
Microsoft	B-Protocol
Active	I-Protocol
Directory	I-Protocol
Domain	O
Services	O
to	O
Microsoft	B-Application
Windows	I-Application
networks	O
.	O
</s>
