-----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-simplemachines-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-simplemachines-14.2-jessie-amd64.iso 79f410a94b21dd4b68c784d7c328e9e30a829e25a8372bfa714912cf2822ec97 turnkey-simplemachines-14.2-jessie-amd64.iso $ sha512sum turnkey-simplemachines-14.2-jessie-amd64.iso 20973de946628debf40043691082bbced12e83124de079125587ca8a3620c9ce6d968c896cdfab5d4c7fc9b3420d8632d697390bfc5b7f4f107351c923397d66 turnkey-simplemachines-14.2-jessie-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-simplemachines-14.2-jessie-amd64.iso.hash turnkey-simplemachines-14.2-jessie-amd64.iso: OK $ sha512sum -c turnkey-simplemachines-14.2-jessie-amd64.iso.hash turnkey-simplemachines-14.2-jessie-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEcBAEBCAAGBQJZIVn5AAoJEIXCXpWhbrlN8uwIAKeluXtux70o4adXoZtHRQT5 sQfK7OFIKQ9Fgfk0F5nPgu6TDE7RjWq1za00nTSPI+kjFhhq47OlgXQqQMAZJcTD Z4mhB00WtbtyJ4xrBB/cjBrTX0dTLeAeeeAMZu+vsYB6JaGSsZxVbo99vxi49utv Er2jtH3OBLi3H6Sy6Wxp8Cb+0VuzZRbxCOtkexF7r7KCno1deiOW6c7VWoIYJIFm hXIxyxA4Vh9c9yxmCT7bvwNtHqTGafxzpT0VY9soffZ0OrSKuLLBlyH/13JTVued n1OhT8cE+d2qfaqpdm7F9SDco9PD5zzKjH2pJR7t4KaVtWWTcsXv0qdB8DQWCII= =CAoI -----END PGP SIGNATURE-----