-----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-core-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-core-14.1-jessie-amd64.iso f08b14925ed27eb3e180208fff0aae04 $ sha1sum turnkey-core-14.1-jessie-amd64.iso 4a5a2128bf5435dc598c0345da1eda82182bfca2 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlNLbkH+QH55WkS4EK3H42bgJf1NZWX CpijXScl/GtIVF9HloG062Bs1c/ylt10nDcJsmzxygorUnvJ8S+0tDwYtydLKfpk semx0cv2/no2lFs9CFFfY22kPOs6KGDPaoB6hqBpzhwpwDddVS9+CMnpfR0H7VTX ddMQLnKSd4/FSYO7DAprPnHBCgCsL8r/Gkl+x7e+nBWS1Gs+dSK9/+FyRbC3Ab1S 8fmqhVX1zrd79ns4pHCu3YuSFXiTqChdRpCwVvgqBTuPLcbBfMXpfV8k3++Y41Cj DzljNbm6QVcJy+VHd2eRUgI4H2Cb4/xXveHK4Rybb03IPoB2TRrTJjirX4J4qO0= =rxkz -----END PGP SIGNATURE-----