-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Two steps are required to cryptographically verify image integrity. 1. By verifying the integrity of this signature file, you can be sure that the checksums included in this file are valid. $ gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-simpleinvoices-14.1-jessie-amd64.iso.sig gpg: Good signature from "Turnkey Linux Release Key" 2. By calculating the image checksum and validating the hashed value is the same as listed below, you can be sure the image was not corrupted in transit or tampered with. $ md5sum turnkey-simpleinvoices-14.1-jessie-amd64.iso d70a7277ae7e62cd947530dbcf650e86 $ sha1sum turnkey-simpleinvoices-14.1-jessie-amd64.iso 2e75010fbfb4e91d536a73be6a6c1684f6347a03 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP0AAoJEIXCXpWhbrlNiwMIAJC0JK5Zldq4okzBJiPsIKKz gtFZAUYBMx6ARUTmzE62RiiYpE7Qiol6LwDkIHaMVzuTIabf38NleUB7nrQ3QPU0 oP7mNX82U59Cx5rMiCLdup36/nS1Z9o+7j4ck0v7m+73rcdVwqf5vkn8fTu1ibpu 2Ilm1FoUiHSIT8nn+5OZHZocp0sqWoxPtzU9o7T/iBXuELUDls1wjOV9goHwLuRK 9QAwwPALxRGiK8vpxPh6FLOoyBwBa4Leg/M7wFdc3L9CCzb/amBYov0vn6vVubxa M6ykcXL8FMJi6v7EUUNjmo2dkkPjjz1HaxLRzRnS46njj6rghp2h5N0pVupN4pI= =FlAz -----END PGP SIGNATURE-----