-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

To ensure the image has not been corrupted in transmit or tampered with,
perform the following two steps to cryptographically verify image integrity:

1. Verify the authenticity of this file by checking that it is signed with our
   GPG release key:

    $ curl  | gpg --import
    $ gpg --list-keys --with-fingerprint release-bookworm-images@turnkeylinux.org
      pub   rsa4096 2023-05-22 [SC] [expires: 2043-05-17]
            2614 7592 087C 0EDE 4214  3B63 7761 DEBA BBCF BA7C
      uid           [ unknown] TurnKey GNU/Linux Bookworm Images (GPG signing key for TurnKey Linux Bookworm Images) <release-bookworm-images@turnkeylinux.org>
      sub   rsa4096 2023-05-22 [S] [expires: 2043-05-17]
      
    $ gpg --verify turnkey-nextcloud-18.0-bookworm-amd64.iso.hash
      gpg: Signature made using RSA key ID 26147592087C0EDE42143B637761DEBABBCFBA7C
      gpg: Good signature from "0"

2. Recalculate the image hash and make sure it matches your choice of hash below.

    $ sha256sum turnkey-nextcloud-18.0-bookworm-amd64.iso
      486edaf02ab4c3d7080f4655672111978fffe1b38723f99574ba6a2f83390148  turnkey-nextcloud-18.0-bookworm-amd64.iso

    $ sha512sum turnkey-nextcloud-18.0-bookworm-amd64.iso
      5ea90a059847b869f095ff8f603ac9845f16cee242ab652333f6823c0f76ed45367c651714f9a064fc0ed3f7ed484c0c335e32d3de8999d9344ffb1afd57b052  turnkey-nextcloud-18.0-bookworm-amd64.iso

   Note, you can compare hashes automatically::

    $ sha256sum -c turnkey-nextcloud-18.0-bookworm-amd64.iso.hash
      turnkey-nextcloud-18.0-bookworm-amd64.iso: OK

    $ sha512sum -c turnkey-nextcloud-18.0-bookworm-amd64.iso.hash
      turnkey-nextcloud-18.0-bookworm-amd64.iso: OK

    Final note, when checking SHAs automatically, please ignore warning noting that some lines are improperly formatted.

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OSpj1OV6hk+XUbYsYwPA6gqEVbokFMBUbhYIVkYAmgd4gkMWPx+LI5zva9vPp9Ut
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Ry1p6Bjtmq+2oau2SawBygCsXSgYfV+I1wKizfv+HIAiT63S6pHCdFSiytlV2P2b
5UUvOCmwasqd2wMQqB7/50vC5FU/3IEkaBxcl5uRoEGLczvkIH7Lq0A6dm5otxGs
GmgXSS14SJ40l2uROGMrntuUb9ti05360Ey4+jXMfBl5VTQinKk=
=AFs4
-----END PGP SIGNATURE-----