Hello,
is it secure to use for different files, to be encrypted using "gpg
--symmetric", the same passphrase? Or does this pose a risk of a
cryptographic attack which would not exist if different passphrases were
used?
Background: There are multiple notebook computers whose each root
filesystem is encrypted using dm-crypt. The partition encryption key is
is different for each encrypted filesystem and resides as a file on a
different filesystem in encrypted form. It is not feasible to store the
different encryption keys in one keyring (in order to avoid multiple
files encrypted with the same passphrase), because then, copies of that
keyring would have to reside on all notebook computers. It is not
feasible to use different passphrases, either.
Thank you,
Xuân.
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