-----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-postgresql-14.1-jessie-i386.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-postgresql-14.1-jessie-i386.iso a07e0ef21dd2430127f527ad09ca1b66 $ sha1sum turnkey-postgresql-14.1-jessie-i386.iso 1b975905e04753ec47adb92dfc4ffd0375140b3e -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPzAAoJEIXCXpWhbrlNmf4H/3jq29yi5UNfaCVx8ASfv8EB 8/FGr6xOQPyHJH1VdMMH30I/56w+f7z9NodySLuWP97wnkM0c/kMgYVeo/raYz5h P02DK/pgTKChuTEhkgxFSyuSODHL+gVzcOkm7BK3qzjvQd32XTOrfS18TVBuS98H jXyPzabITMPmd3NJFKYIDU+bJIXxw0IC/JO9KBfY1Aisc7CC4gIEL1vnLijY4MFk /i6ltziD9YcZbkac3KIN8Rtshl75HEspc4gJnm5zn5t79iGrI3SRY25xznEaaoit NDZZWZJ9yItrjc0B/tJuCWi33EVl0VCNItJSNlGeH+0QY4ZztxXutzpGpw5qd80= =6CmO -----END PGP SIGNATURE-----