-----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 https://raw.githubusercontent.com/turnkeylinux/common/18.x/keys/tkl-bookworm-images.asc | 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-bookstack-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-bookstack-18.0-bookworm-amd64.iso
      4d560c8b5f6e11ed273e215f7543a333da5f8fb92d1d0edecae1bc1843f535b1  turnkey-bookstack-18.0-bookworm-amd64.iso

    $ sha512sum turnkey-bookstack-18.0-bookworm-amd64.iso
      1a2f72300c8ef712e0dd21b45ff20e3df1557677929cab5da9bbb98b1d0c66c55c6687c8c87cbe2b643c57848197295c4a61fe25d3891cf2e775c1860f42695a  turnkey-bookstack-18.0-bookworm-amd64.iso

   Note, you can compare hashes automatically::

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

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

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

-----BEGIN PGP SIGNATURE-----

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3jfLjw/8Cs1UrH22okl0K07oh04dpoganoxZQ/fHqKtj+fykPzGIIFsnXFjAOn8q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=5Hh5
-----END PGP SIGNATURE-----