KMail/gpg

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    Revision as of 21:03, 28 October 2010 by Claus chr (talk | contribs) (Importing a new version from external source)

    Du kan bruge KMail og gpg til at sende krypterede eller digitalt signerede mails. For at gøre dette bruger du knapperne Signér og Kryptér i KMails vindue Brevskriver. Det kommer frem, hvis du vælger menuen Fil -> Ny -> Nyt brev....

    Oversigt over GPG

    Et web of trust består af en gruppe am mennesker, som stoler på hinanden. For at vise deres tillid har de signeret hinandens nøgler. gpg lader dig gøre dette.

    Et web of trust udvides ved nøglesignerings-fester, som foregår således:

    • Du ([email protected]) møder John Foo ([email protected]) som allerede er medlem af et web of trust
    • du installerer gpg
    • du her en privat og en offentlig nøgle eller genererer et par med
      gpg --gen-key

    Din private nøgle gemmes i "secring.gpg", din offentlige nøgle gemmes i "pubring.gpg". Du gemmer din private nøgle sikkert og kan frit distribuere din offentlige nøgle,

    • Du finder din fingeraftryk (navn)
    gpg --list-keys
     /home/me/.gnupg/pubring.gpg
     ----------------------------------
     pub   1024D/45E377BB 2008-02-03
     [...]
    • Du uploader din offentlige nøgne til din nøgleserver
      gpg --send-key
    • John downloader din nøgle fra nøgleserveren
      gpg --search-key me@home
    • John kontrollerer dit pas og signerer din nøgle
      gpg --sign-key 45E377BB
    • John oploader din nøgle igen
      gpg --send-key 45E377BB
    • Du er nu en del af dette web of trust og din offentlige nøgle er på nøgleserveren.

    Hvordan gør man...

    Import a saved keyring

    If you have a keyring saved to your disk, reload ("import") it like this:

     gpg --import

    Note

    yours may be called 'secring.pub'

    Then call kgpg and set your trust on your private key to "ultimate."

    TroubleShooting

    Whatever problems arise, first make sure your gpg is properly set up:

    • List your keys
      gpg --list-keys
      • Has to deliver something like a sensible list of keys.
    • Check the output of
      gpg --update-trustdb
      • In case of a problem look at the below.

    No ultimately trusted keys found

    If

    gpg --update-trustdb

    delivers

    gpg: no ultimately trusted keys found

    Call kgpg and set the trust of your private key to "ultimate'"

    "Gpg does not seem to be running..."

    You get an error message like this whenever you start up? You need scripts to make it start and stop cleanly. You can get scripts here:

    Copy them into your ~/.kde/env and ~/.kde/shutdown folders, check permissions, and make sure they are executable.

    Still not working?

    Check which pinentry packages you have installed. You may find you are missing pinentry-qt4.