Fehlermeldung Unusable public key (key was expired, solve by extending the expiration date)

Christoph Stahl's Avatar

Christoph Stahl

25 Jul, 2017 10:14 AM

strating 2 days ago I'm getting the following message:

gpg: 5C72AAA21E86E1072DCD9F9D52E21E880F86D926: übersprungen: Unusable public key
gpg: -&5: encryption failed: Unusable public key

  1. Support Staff 1 Posted by Steve on 25 Jul, 2017 12:07 PM

    Steve's Avatar

    Hi Christoph,

    welcome to the GPGTools support platform. Sorry you are having problems using GPG Suite.

    First, let's check if your key is ok:

    1. open GPG Keychain
    2. double click your sec/pub key
    3. create a screenshot of the key tab (⇧⌘4 + drag w mouse)
    4. create a screenshot of the subkey tab
    5. attach both screenshots to your discussion by visiting it in your browser

    Should your key have expired, please re-new the expiration date.

    Should your subkey be expired, please create a new subkey.

    1. navigate to the subkey tab
    2. click the "+" button below
    3. confirm with "Generate subkey"

    After that send a signed and encrypted test mail to yourself. Are you able to decrypt and verify the signature successfully?

    In case your key resides on the public key servers, don't forget to upload your updated key, so that the changes are reflected on the key servers.

    Best regards,

  2. Steve closed this discussion on 25 Jul, 2017 12:07 PM.

  3. Steve re-opened this discussion on 25 Jul, 2017 12:07 PM

  4. 2 Posted by Christoph Stahl on 03 Aug, 2017 04:04 PM

    Christoph Stahl's Avatar

    Hi Steve,

    I solved my problem for the time being. My user ID had expired and I just changed expanded the expiraton date for another year.

    Best regards,


    Christoph Stahl
    80799 München

    +49 171 2332033

  5. Support Staff 3 Posted by Steve on 07 Aug, 2017 12:02 PM

    Steve's Avatar

    Perfect. Glad, this is solved for you. I'm closing this discussion. Should you need further assistance or have questions you can re-open this discussion here or open a new one any time.

    I attached open tickets covering some ideas to prevent users from running into expired keys.

    Best, steve

  6. Steve closed this discussion on 07 Aug, 2017 12:02 PM.

  7. Steve closed this discussion on 27 Aug, 2018 12:37 PM.

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