-----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-mambo-14.1-jessie-amd64-openstack.tar.gz.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-mambo-14.1-jessie-amd64-openstack.tar.gz 3319952c6814a53cf1426d7ba4e1be18 $ sha1sum turnkey-mambo-14.1-jessie-amd64-openstack.tar.gz abc99421cc0774227381aa94157e4cb35d53b4f7 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJn1AAoJEIXCXpWhbrlNWjgIALsdAVpBB7i3dRkyMKWMXtU6 DQQ1SErh+yffJATC3qNHq/alyr5Sw8T8nfd0p4T64MvKBcBzSEV5IN5w5pDTWuMD GdhfYIAh7aitfIfUrvwicn4y/ML7EcG/2m62TdmGAR0qAJRMYQInkp+sJCjAtwIv /1Z1dbIUOMZO4qmOdFvAjt62sa3rehfJK7O5Y5Td8A+aF3OwSBPmB7eDfZ3ltFB/ pxhgoGE2WoK/W0cPIYBQEp4Jwf1hy5TTYvKSDA5dIvAeE72d6CpNF4k8fmEapTTM OGPt5SLcbX+iWdCON1IqyaTjKHMi5WBopiUoKPpoMIMSMmTqf8d1solj436c8CY= =996r -----END PGP SIGNATURE-----