-----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 debian-8-turnkey-concrete5_14.1-1_amd64.ova.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 debian-8-turnkey-concrete5_14.1-1_amd64.ova 75becce41d4b9df942c54405a9b6f478 $ sha1sum debian-8-turnkey-concrete5_14.1-1_amd64.ova 23795815231e370dde2d4685244e81dbd4dab0a8 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnqAAoJEIXCXpWhbrlN0j8IALR8Oc3Lj+LWisn8kh6sujvz EEjhHll3ZoPirS97C4PzBaKqJAxrF9RmOKUmvDgI5osrP9lbTjMsg7k5rbpr8IMq x3V/R77PzmPAgRqUKKzQxpiktseKGF5Y/3pgbTqM+iTq7Ex1rgEyfkEK1dH7DgEA GZcSdcT+yQ5mIDQIwg6GO7ExAn8tzVVHUEwvFToNDy8wLJ5o5OaLPQ5P0Uto+ZuB ecwfVQrvOG2A88KGk5SUezly4XNBBJY53S3A5Db079cwIfVAVrgBJg3g2RUaHVIe OtnQcHBcAcmuErDUKbNrtB0lVp9UXb702q/nbvDQ0MvufmYumWT23E6jmvLpifk= =t7FD -----END PGP SIGNATURE-----