-----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-concrete5-14.2-jessie-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-concrete5-14.2-jessie-amd64.iso f01261d39f35ff749f67c8e7b9337ecce74287e87ae9f1ae59b97c16e98f47f8 turnkey-concrete5-14.2-jessie-amd64.iso $ sha512sum turnkey-concrete5-14.2-jessie-amd64.iso 14753db59244bdeeb8ac5bfbbb8de2b32eea5b27090f46f51b5e0474d433e5e64aaf9306a4ff00aefb7df521c8f89cc335df2081ad1c875870685d5e367c8885 turnkey-concrete5-14.2-jessie-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-concrete5-14.2-jessie-amd64.iso.hash turnkey-concrete5-14.2-jessie-amd64.iso: OK $ sha512sum -c turnkey-concrete5-14.2-jessie-amd64.iso.hash turnkey-concrete5-14.2-jessie-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEcBAEBCAAGBQJZIVn5AAoJEIXCXpWhbrlN+AoIAMjRqLJBQcTQeroTRNhs0ldc FxMLl49aBrCEE7Eaxl42DjRdOy4sipxRm4JgoG5slnBpo/8tVIQOnGVCOkqrDCqr HCo+clmKm+Fk4TBZYMPid2I9AR6lQ5obP351i/IC9NG/2iVgUHnTC2zrnBDlBxbd FvE+STVnLMz9tWdN3/fS0ONx36e8lSYXFID9dm2lfxwSIaRNBRmAq2Z/Eda12avz WrqU8sHUUoCB18OmQyTJQ1ohnCjg+uI3I4UKMVwrokYrpq2INndpp3XqEKjE1ik1 Oh83mrknLGqEjZdqvO220bDfmfLq50OnI11kFYMyAM+cLrAarTVBrHUdtdFrCjw= =ppvq -----END PGP SIGNATURE-----