-----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-tomatocart-14.0-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-tomatocart-14.0-jessie-amd64.iso f9d1a60749be547c90ae60203c399e45 $ sha1sum turnkey-tomatocart-14.0-jessie-amd64.iso 8625773f0d1e895c97cff9b6462a72f20e62ea8b -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrqAAoJEIXCXpWhbrlNWn8H/3Nnzmizz+frHN8g9VLqhkez agukOdOShpk0nAMkdaYqBwnyui/FSp/lOz0+PB0/6zLgU0i6CTrFdJeDJyZvC6hH HNgKSDMvDtew74VRucR6fSxAaQeHTI+BrzzRNv+80h3hrVNvPbRV0tD17ok2aZsu rHqJb98xjkTIzmidmiq1R2WYqPR23B07vqTlDhw4FmKTTGQdSjNWC/vgn9mjUAFF 1mmI74t3+F/zQdOHKB4f0c0VU4X1STSAQH2mP5Cux2TogXDcUt789RawSOPHg6NR HWwkf5R3NpGFTpPeYGRpLbIaF6QtHf27xw/DepUxrpR9UKvyVQ8bwWjBYExrOXU= =wgwX -----END PGP SIGNATURE-----