Creating Encrypted Time Machine Back Ups to a Network Hard Drive

Hello all, I can't seem to create an encrypted Time Machine back up on a network hard drive. Can this be done? And if not, why not? It seems that Macs have all the necessary functionality already available in Mac OS. Time Machine can create encrypted backups with multiple computers so what's the difference if it is to a network backup drive, honestly? Any suggestions?
My Set up: Three Macs, Airport Extreme Base Station, Seagate 3 TB HD (with separate partitions for each computer's backups). 2 of the Macs use ethernet to connect to the network and one uses wireless regularly. Basically, I'm trying to encrypt my family's backup drive and I don't know how or why I can't.
Thanks in advance for the help.
Appleguy514

First, you need to know that backing-up that way is unreliable and not supported by Apple. See: Using Time Machine with an Airport Extreme Air Disk.
Second, no, you cannot encrypt a network backup on Lion or earlier. Only Mountain Lion.

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tgs6164 wrote:
I have thousands of photos on my Mac. If something happens to my Mac obviously, I don't want to lose the photos. I do Time Machine back ups to an external hard drive once a week. Is this good enough to make sure my pictures don't get lost?
Purchase a couple of these when they go on sale.
Start burning all the photos onto DVDs.
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peiper1 wrote:
....... the suggestion to enter the TM "Star Wars" display only applies to back-ups residing on my internal SSD, right? ...
No.
peiper1 wrote:
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http://support.apple.com/kb/HT4878
peiper1 wrote:
.. I would like to delete the back-ups on my external hard drive, do I still do it the same way? ...
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Creating Encrypted Time Machine Back Ups to a Network Hard Drive

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