Comment 27 for bug 384469

Danne , i hope this can help you, but you can install anyway if you choose
to ignore the safety message..and click okey, install..

here is the long version of how to add key :

How do I use software from a PPA?

To start installing and using software from a Personal Package Archive,
you first need to tell Ubuntu where to find the PPA and how to verify the
authenticity of its software.
Adding the PPA to Ubuntu

Step 1: Copy the first line from the apt sources.list entries section of
the PPA overview page. For example:

deb http://ppa.launchpad.net/awn-testing/ubuntu jaunty main

Step 2: On your Ubuntu computer, open System > Administration > Software
Sources.

Step 3: Click the Third Party Software tab.
Screen shot of the top tabs in the Software Sources app

Step 4: Click the Add button.

Step 5: Paste the line you copied in step 1 and click the Add Source button.

Step 6: Now copy the second line from the second line from the apt
sources.list entries section of the PPA overview page and paste it in just
as you did in steps 4 and 5.

When prompted, reload the software sources information. Don't worry if you
see a warning about unverified software sources; we're going to fix that
next.
Telling Ubuntu how to authenticate the PPA

Now Ubuntu knows about the PPA. It also needs to know how to check the
software hasn't been tampered with since Launchpad built it.

Note: This is not an endorsement of any of the software in PPAs. You must
make sure you trust the PPA owner before installing their software.

Step 1: On the PPA's overview page you'll see the PPA's OpenPGP key id.
It'll look something like this: 1024/12345678. Copy it, or make a note of,
the portion after the slash, e.g: 12345678.

Step 2: Open your terminal and enter:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 12345678

Replace 12345678 with the key id you copied in step 1.

Step 3: Finally, tell Ubuntu to re-load the details of each software
archive it knows about:

sudo apt-get update

You're now ready to install software from the PPA!

Read more about Personal Package Archives in our help wiki.

> I try use the repository, but I can't make a connection because the key.
> Can you help me?
>
>
> --
> constantly polls floppy drive https://bugs.launchpad.net/bugs/384469
> You received this bug notification because you are a direct subscriber
> of the bug.
>