To keep this cross desktop friendly, it makes sense to create a
Zeitgeist plugin that interfaces with many different keyring-manager
like thing-a-mabobs. Lets call it zeitgeist-keyring-helper.
I imagine that it would make sense to have a flow where when creating a
database, Zeitgeist will generate a key, store it with zeitgeist-
keyring-helper, fetch the key with zeitgeist-keyring-helper, and finally
it will initialize and use the database. All subsequent accesses will
simply call the zeitgeist-keyring-helper to fetch the key in a
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Encryption of database
Status in Zeitgeist Framework:
I think that Zeitgeist should encrypt databases in
~/.local/share/zeitgeist/* for anti-forensics reasons.
While someone may happen to use an encrypted disk, Zeitgeist may serve
as the ultimate accidental spyware to an unsuspecting user. One
possible mitigation is to randomly generate a reasonable key, tie it
into the login keychain and then use that key with something like
http://sqlcipher.net/ rather than straight sqlite.
In theory, a user will never know that this encryption/decryption is
happening - no underlying assumptions about the disk need to be made
to maintain any security guarantees. This should prevent anyone from
learning the contents of the database without also learning the login
password. Modern Ubuntu machines disallow non-root ptracing (
and if the gnome keyring is locked, an attacker would have a much
harder time grabbing meaningful Zeitgeist data without interacting
with the user or bruteforcing the login keychain.
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