-----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_14.1-1_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-observium_14.1-1_amd64.ova bff3729e7e0bdddea22ca28d55be53ef $ sha1sum debian-8-turnkey-observium_14.1-1_amd64.ova ab5c0c7207d5f36818a2f2e8f3ebf90af32f9a82 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnsAAoJEIXCXpWhbrlNbN8H/2cHVRh3xnsqHD7GpyF/UpJe VZI/5X8+CmRAqZpNfe923JmZLu8QUhOkav+DWhogLtmWWYrQdbRafd3YGinZxFNr x07TSvkmLEjvdJS93ktPwwcT3NewzV9CskB5Z1x6ldsR5+bk3QwlPAI/OIkBWtSI 3mMfAVj4CFpw6o3YMm73vP0LtYagnSoPuRIshBhX137hyXmiP798u2LsrYlYfBO4 6BumhDexv7u0vLiGZ29KRyE/kvH6CjG29owjXjxn5ifIW6Y0I6C6QRJBfY/xCwIJ WSsNZZ1/m9wHbf+UDW+Wn8bNH/8mZ1+0+xZxl7Ek6DxZ2KPQJOqo7VhUXr6j12E= =HB7x -----END PGP SIGNATURE-----