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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Benjamin, Bruce P wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">> </span>Caitlin Bestler wrote:<span style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">></span>> How does encryption relate to snapshots?<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">></span>> Is the snapshot encrypted with the same key as the volume?
<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">></span>> Not doing so would force snapshot creation to be a very time consuming
<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">></span>> operation. The most efficient snapshots are ZFS style where the current
<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">></span>> blocks are just frozen, which would mean they are still encrypted.
<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">></span>> Accessing the snapshot requires access to the key that the volume used.
<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">></span>> How will this be tracked?
<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">></span>Taking a snapshot of a volume will require associating the encryption key(s) used by the original volume with the snapshot.<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">If every snapshot has a copy of the key, and every clone created from the snapshot requires a copy of the key, we end up<br>
with a key that is being copied everywhere.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">By default any method of communicating that key will only be as secure as general control plane communications, which
<br>
is generally less secure than what end users desire for data at rest.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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