-----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-tracks-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-tracks-14.1-jessie-amd64.iso 6924d9169d516907c496a62318f65a31 $ sha1sum turnkey-tracks-14.1-jessie-amd64.iso 54d496bb3d6054aa34a9a0efca3b6cdc6ba463a0 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP1AAoJEIXCXpWhbrlNkKIH/jt1blEPZYJOn/XtsEaUWOtF 4vtqKjZUx6jn3LTP1ipR5SBCwNHP2OBDuX37Ya58xS8h1E4iu1lZB0MsQ6CeGKsn NZxiBwA1RXm2r2sWut9mqISA5j8tf470ajrFrUl7N991S3DyHLHBupez1dATs3Hk CQ07TlWLeGS0lqFcFB4dc872sSOOa7GsIiziuGGX/w8sTJhEJTEVRFWQTlZgKzE+ uOfaWNHz/io7g+XDZO3nV1LrwqeT8+qnDh0DZI46Y/CMz2OYAn2PWoLHRKPh44a/ CellqTIFGRchXd2NOWRFVVFr6A+30hdiqbM1A6kJWYr8Q8sDlUkWlrS4zSR08Sc= =HaLH -----END PGP SIGNATURE-----