-----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-phpbb-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-phpbb-18.0-bookworm-amd64.iso
      5e7d7b76a334fb7cafab26110420c3260af508fe2a890d2c9052a9f761ee7d50  turnkey-phpbb-18.0-bookworm-amd64.iso

    $ sha512sum turnkey-phpbb-18.0-bookworm-amd64.iso
      7e6458b03ef649fba38e224173d393703cc7d1280319ff67fde1a401b6a9430e81d592c13ce314e442b33ef90395aba239f060e28c38c2ad9ed6013783a39daf  turnkey-phpbb-18.0-bookworm-amd64.iso

   Note, you can compare hashes automatically::

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

    $ sha512sum -c turnkey-phpbb-18.0-bookworm-amd64.iso.hash
      turnkey-phpbb-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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V6kUnMt4KrTuYpXMiYwIKWFmWHnTiszwkHWzTP6o/2npq5unlrl9WnjbwKTO3QGo
U9aDrCfIWtafP8L5ZwuuIm4Pe23qBW6bcbT2AOZKq/NeXtXwqsRef3Ft8tppjw+G
WgA2yPaq5oCYUwxH7KxxejXMoUUIU6Kly3RBXUkyt75Pykc1fHtlzuEICxyuRNZT
TrYBgN2MhyuFUXZSi2a51v0AufvhbCI5qBm04MnxdRX7FHhlewNsuEf3QIvNi7J2
GhjvscSIBcHx/YfqhIcOxHJUi8CO8yOlpI92KF4E6MRR7Gr34+wkxQlGCPgxr1vQ
UkSyom1JdmKPMPH0NkDnl6gQbVJTG0vdB7OBrW/aOnPPmM/btLWERHKLt4bKuma9
XvzayJQ1izaRl0MZ+JCbyVBhasKDM5cC3Xf9hBbioLgAeRgL3gRCR9/HqyfFwpc2
e8pVAozcZ43arpFsLJGnaVfQTMlJTc4bUgHHD9jZ9EpZ7LqJqHeEIvIXCF31ACvn
gldgjpeDM9qMUp5IK8E7WG1shZwG4ccmaMHl9QTAj1jj05rlqe8=
=HTbk
-----END PGP SIGNATURE-----