-----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-zurmo_14.1-1_amd64.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 debian-8-turnkey-zurmo_14.1-1_amd64.tar.gz 9c56354121d7c6c8bf58aae94c9c7ebc $ sha1sum debian-8-turnkey-zurmo_14.1-1_amd64.tar.gz 794133c7c66baba5d6792a5c51da1e1ca0441cc9 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnwAAoJEIXCXpWhbrlN7y0IAJQUC+nzwx1A5KvZ0DMfS1SY rgJG6A5qQqJd3YRmYmRG3fw9EPc5SQ4B++orKVNOPnYY7RcPvMRipj+boAyhyj9c CkCcbLDBXPhehacX9e2dRdhkirN2o5UFFwGL+VJLRa9hL2Cr4s+tSYkUcR57ezDp H3GyEKb/YNhMTG9XPBtjB+yjI6EIgusfPTh2+uX4zf8HznciPts1XMk/9eVvXqLG ZrvMRdKus1pW7t+KhGUSTgSYlxjwPrj1ixlINqv5gb2nDifJNrjmcTgg64Q7S2bY HwADIq3SMMu7sontI+u0+KNAqzoo1BMxkhe7cM629bLNCUtLa5gpjzg+VxzkhvU= =k0PZ -----END PGP SIGNATURE-----