-----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-gitlab-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-gitlab-14.0-jessie-amd64.iso 13f3a914d634007a68dec62f4f7ba112 $ sha1sum turnkey-gitlab-14.0-jessie-amd64.iso 8ff270cb061f276294788895e5febaffe6b26f34 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWL0DfAAoJEIXCXpWhbrlN3UMH/3vpv85LWeMN1tz0G6ttRbHT QW2mUj62HesJSRWuY0axVcVJmKFqLJneNdpxkkm1ppcHFysLUAxXoShpdJpLXEoN pBDUhdqPe+SpG79/Rf/lJ6QX+gAkzfDX01lwPVlQzXF3QaFo01l4HGOThJ61aIHi s9McfHNpKqpcjK6uUfKS4SYOFrxiTlPqe9Qy3PJ4k12iyI5lwOIw22Gpd1/XIDUS W+nvjgSYyOnNE0KJuUMKSlE/EK4TfCkNdV86rb8XeX/8N7bj0Oc5VinGST+k2+P4 L4+ZNjm/GHUkBPL1UO+UZ0nwbDljgJQgnKR2VZ3qqB20xTki+5UQXgp35zHS8kE= =jwZX -----END PGP SIGNATURE-----