-----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-observium_14.0-1_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-observium_14.0-1_amd64.ova 0b41ce77cf6fdc58ef475389ff9eb40d $ sha1sum debian-8-turnkey-observium_14.0-1_amd64.ova 1456ab6d5d50b45f5c6e2ba0a6b35240b63668c1 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWObxUAAoJEIXCXpWhbrlNsC8H+QHTu6GNJzw9abeHoPzIG9OU 7GOs5CZ0ZXuT1UmVZdfQnK6HEzodcVtDt7X2xFJMQwFma1pYlywv+LXnZBuGZmTD 1J2W1ltzTce8v4Cv72Bpx7vKYM0uluhQObbciKbM8xG98qhPIntv0Gvyzjnymhyf iG4ElBqwzOyb6eLR9zewdOcoU3Iwk3yMaBOOquwniwyf6Zhsclt3JKj5pPBrOlyA u3DPpOh/H/ijquPuAYFMWkHZrrXduZ1S1wol1cOyjHzmKbZljixjdkOkpDuyfVxm AxnlI8KCD1d0wzDdsUCSsJm/VQy+mAf5YUpYBdRmBy3oPILKZWrGtVfXzEsrFGM= =qdUS -----END PGP SIGNATURE-----