-----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-b2evolution-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-b2evolution-15.1-stretch-amd64.iso 9575e3f00173c8f5e870160eadf9c69820cc263edab2045f0efc20dc0d9ed4fb turnkey-b2evolution-15.1-stretch-amd64.iso $ sha512sum turnkey-b2evolution-15.1-stretch-amd64.iso 09eae9b672c96e67dd472b7bc619f85587576826dd59d68a5936772f03d93fdc55cfbba0c1adf1cde1871722eaf83f8d939696b7a6d42633426ec19546426bdb turnkey-b2evolution-15.1-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-b2evolution-15.1-stretch-amd64.iso.hash turnkey-b2evolution-15.1-stretch-amd64.iso: OK $ sha512sum -c turnkey-b2evolution-15.1-stretch-amd64.iso.hash turnkey-b2evolution-15.1-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlvITO0ACgkQhcJelaFu uU1Rzgf6A71aGPycMdgnT4bVpnZ4K7rzgObFdZVXi/vQYmyUVJWCBeQjCNg6gykC ISJOIXfJi89kNnkT9PJWJD2Vtr2/APW5JtNmLGUJ5RGyewwx7bY0JW3iiUbdnLu4 GtvF5qGRqUq1LFLId8dFxvqczTsai3sOAn7lDhozUsgwfS95Bt73XK31L2hPSKlV Q/Yp0L4G5TObU+tqWAEIU/9HLqAPxF9kuWcodv8Z/tjJdzi3YVp5dRu7dEm3ENS2 3JbEgfS8dRsYBgNB4LK0WUfEZ8R/Mrn9AjVjUyC/Vi5Kl5d70YhZqgxA4V2SMpDr nxJ95BTgdqDMq3nY89Lzo/O3M4+FMw== =vc5n -----END PGP SIGNATURE-----