-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 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://keybase.io/turnkeylinux/pgp_keys.asc | gpg --import $ gpg --list-keys --with-fingerprint release@turnkeylinux.com pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] Key fingerprint = 694C FF26 795A 29BA E07B 4EB5 85C2 5E95 A16E B94D uid Turnkey Linux Release Key $ gpg --verify debian-9-turnkey-limesurvey_15.1-1_amd64.tar.gz.hash gpg: Signature made using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key " For extra credit you can validate the key's authenticity at: https://keybase.io/turnkeylinux 2. Recalculate the image hash and make sure it matches your choice of hash below. $ sha256sum debian-9-turnkey-limesurvey_15.1-1_amd64.tar.gz 50a8053ea04197ce30c0a12aa48d4087c198cff1c979b4077760c4d0c23607a7 debian-9-turnkey-limesurvey_15.1-1_amd64.tar.gz $ sha512sum debian-9-turnkey-limesurvey_15.1-1_amd64.tar.gz d33c5ff961347378e3a530ee1a1937a6054e47013e2766b60d2fdabce8196089cd23253b8aab5917ba46db15f892233813be1283d919234a345432180757741c debian-9-turnkey-limesurvey_15.1-1_amd64.tar.gz Note, you can compare hashes automatically:: $ sha256sum -c debian-9-turnkey-limesurvey_15.1-1_amd64.tar.gz.hash debian-9-turnkey-limesurvey_15.1-1_amd64.tar.gz: OK $ sha512sum -c debian-9-turnkey-limesurvey_15.1-1_amd64.tar.gz.hash debian-9-turnkey-limesurvey_15.1-1_amd64.tar.gz: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlv/pg8ACgkQhcJelaFu uU1JHwf+OK+Y07pocja5MiAW9wXehwFvrPDUbMqyBYFvFDjatXZ/9GRYLDU/wqYn B1ae7No062afQcn53EkG1EtvoGczXyQ3/BgD5fAfFzYEkpePsJycpdXPkVIyVTwN j7jiP2vupcMTnC1KmWbpAKA68GAjJITh2OrwWDysv/XPZEZqPmgL+AAEJ/GFNeJI 6Yj4ewTcyFKkD37vZLZCaDYZ0kQItfcv0QWi/Qs2cdJ3Xm6suhliuqawSM7Sy4bC jEsrpUTzRpjjgkp5VaNF+kC/eX8ppGXDzISlvQqzxYY8UH7MJTTePXI4d4UefZZw brWn1YJzY88Si2bdivuzT3KYz0J1lA== =MpaQ -----END PGP SIGNATURE-----