-----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 turnkey-limesurvey-15.1-stretch-amd64.iso.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 turnkey-limesurvey-15.1-stretch-amd64.iso d5e0841c8c5656d0ab1d7ee7d84a673351bf1ea6f3e52162a1ada706157a95a6 turnkey-limesurvey-15.1-stretch-amd64.iso $ sha512sum turnkey-limesurvey-15.1-stretch-amd64.iso 0806175dd64c92ef6197d2a062e561ceb57f60ed3aad4a677c36d8e35de35960be5b38da36ff9a9803b59fee3662cd617c663805efcfb883242379a6d8a2feca turnkey-limesurvey-15.1-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-limesurvey-15.1-stretch-amd64.iso.hash turnkey-limesurvey-15.1-stretch-amd64.iso: OK $ sha512sum -c turnkey-limesurvey-15.1-stretch-amd64.iso.hash turnkey-limesurvey-15.1-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlv/piYACgkQhcJelaFu uU3lQwgA7QJ8o0IE0HDCGvfZGvnSfif4liQxl6+ezKNmhn+CxQFHBXthj/7T9RqY r2NxRmXpc7tyyvyGk6M3SIhkyfJI6vVFYfkCpD01zGCjvBgVqVq4JrTfg0dx7tlQ QkcdNSAN2jiFl4+yPHb1jsbWtpdeBgpiIbv/qHz4iKmh+p9v7pcwXANDTOyzS1W0 27e0Mf6Cra7tGLsktc9U2f7xbL2hUNHBz+XlQMJY49e3MD833efJHqrnV0M8327G A1ty/WsChAMHKa+foPL6KF4OEyUta0BUzvNIU3ycuEO3P/5sD6h0/NUjaSNgwUP0 ivHnnkTjAqcMuKRxJI9cvjN0NTXHPw== =e0Li -----END PGP SIGNATURE-----