Re: encrypted swap (was Re: [PATCH encrypted swsusp 1/3] core functionality)

[Bodo Eggert <harvested.in.lkml@xxxxxxxxxxxxxxxxxxxxxxxxxx>]

Andy Isaacson <adi@xxxxxxxxxxxxx> wrote:

>  * the key is automatically regenerated every 2 hours (or whatever); as
>    pages encrypted under the old key age out, it can be freed eventually

Changing the key would not help, since if you can get the swap pages on
a running system, you can also get the keys, and if you are using a limited
set of keys (you obviously want that), using more than one key will just add
a small linear factor to cracking the whole swap data of an offline system.
-- 
Field experience is something you don't get until just after you need it. 

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