-----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-tomcat-apache-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-tomcat-apache-14.2-jessie-amd64.iso f0af7f085e8e435f1ebc691c4e8dfb7c89d0086995cb16ff9929b1c2e4d38886 turnkey-tomcat-apache-14.2-jessie-amd64.iso $ sha512sum turnkey-tomcat-apache-14.2-jessie-amd64.iso 898a1499653f679c3b084ef042e9c3c94edebbf6c0e9c42ad63064f8cfdbc245b94b5dd9866613c6fadb7c4107853ca81c1daec832a27e77346b85fd31e0639c turnkey-tomcat-apache-14.2-jessie-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-tomcat-apache-14.2-jessie-amd64.iso.hash turnkey-tomcat-apache-14.2-jessie-amd64.iso: OK $ sha512sum -c turnkey-tomcat-apache-14.2-jessie-amd64.iso.hash turnkey-tomcat-apache-14.2-jessie-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEcBAEBCAAGBQJZAJDqAAoJEIXCXpWhbrlNYE4H/2rGXLbz+9zemRJ811VPb1bJ zWovKVW2TZb8i1aZk3crPkxQpHXtu+DX8F7vOl8plraa4AG7uYp++IxTQEE2/Vvq +ZCsfWn/VMJxn27OVOxh9xKdt6E6hoxbZACn7yU6Wp1BEUiiSxd08jJGHieayyno cQGx0bTPRpneKWUbeIDWifzMOOfMMN2P4ZsH9KzhSWzrqtZqKAHtmUNapNF1c34w 9q4I3TjKvAxSB+J5gy4yrIAsJ0XrgK70PXc4wMHkFfu84P3Hl8r65UI9JGdV3474 HkQ9Uxpe5ET6hK2Llem0EC+wjvELLJNqKpwXTdDoup8vlEcvkD+8eWlnzZEzkHk= =vzG9 -----END PGP SIGNATURE-----