-----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-codeigniter-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-codeigniter-18.0-bookworm-amd64.iso
      28a4dd375c614b15b6f51538fc114a691332e39428c6eb8cdf4bc8c6e2a20789  turnkey-codeigniter-18.0-bookworm-amd64.iso

    $ sha512sum turnkey-codeigniter-18.0-bookworm-amd64.iso
      cf36bec0b9459b06c159f7cc87b29d97ddfab089974b7d5d8c5066cb98eae3d53919f4c74fcb0fafea22aecd1370e1a452705a487a69815db716c23b4ecc329d  turnkey-codeigniter-18.0-bookworm-amd64.iso

   Note, you can compare hashes automatically::

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

    $ sha512sum -c turnkey-codeigniter-18.0-bookworm-amd64.iso.hash
      turnkey-codeigniter-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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bC+vqhHyYHrUg4rwdifrYQj7AI3e1bLN+2R1E2SGqNa5g342NJRiPCj79E71uqMz
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b/ZxksAFMCXa/+pCvtU2WDgGFbQPpVoitvffZ0VpL9jO/QSP/ttbxuzS3cTmzb/O
4BuEqBu1F3G1Wt3No+UNh7wdGtL+OeeIjVS6mg1RxsC99T8I0DgK6wChHj9laLIA
W90Kf1mLWyJWsFxrwb8z8NPxbh7gZJELCy8QsdF38fGPpSNDi/g/ermXI07RDW5x
2OdSuo5pr1YaZWb68mjjbQCFy5UdzIp5doMTvMeTanUNp5AetzacNqdjpGXb7dxf
BLSYL7iKVx/X8XPJ3wf6H2TbM5DLkNRtMcuqGO+2n+TyIS/C4vt5pVvb/qmhuMHi
l20aH22xwitiFYauGBENZASRLxidTIZE3iNe3Liopvds43+FbRNPV/1tJKHybRGn
+i9cwyBFem3Zj7cTywYo9q674GZVGdWGf4N1emJo5sMBeZkHIJE=
=0ev4
-----END PGP SIGNATURE-----