NIS vs NIS+

I am concerned with the security between NIS and NIS+ or (NYS).  I would like to know the specifics of what NIS+ was able to accomplish and why was it needed in the first place.  The more specific the better; i.e. why are tables more secure than maps?  
aaroncAsked:
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n0thingConnect With a Mentor Commented:
Hi,

Here's a little description. It is however far from complete and
way too long to be well explained here.

A major change between NIS and NIS+ is the extensive security built around NIS+. By default, it uses Secure RPC, with data encryption standards (DES) encryption and Diffie-Hellmann key exchange for authentication. And it does extensive authorization checks before allowing any NIS+ operation. This procedure      ensures that when NIS+ is set up and used as recommended, it is a secure environment.

The use of table instead of maps gives you more control over who
can/can't access specific data. You could grant access per table, per column within the table, which you cannot do with maps and thus more secure. Another reason is the transfer of information
between NIS server/zones. Only needed data are to be sent, new
table, column instead of the whole map.

Hope it clears up some of your concerns. For more information,
please buy the book NIS from O'reilly, one of the best book on
the topic.

Regards,
n0thing

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