-----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-redmine_14.0-1_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-redmine_14.0-1_amd64.tar.gz d31425166c2f2142431e10ae4ffe9632 $ sha1sum debian-8-turnkey-redmine_14.0-1_amd64.tar.gz dd0a65faeb6e2971f4c65f09d13294fe42792ff4 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWTDfIAAoJEIXCXpWhbrlNO4MH/jSiN2DAHWEHdEDQTT4xdbgs KsPEIomYsvOG81bnwvXzc4rr0zbkEOTs7HtnV1lvzVvxCNlXu1HX8flHfcZMLuJu LSZbj6OKMc9rOfnS+eRrEJ+KP6llxSPBt5jFVqntr13+Pl/VTcSzVIT4RcBu6lnE x4l8ilAaI5bNaaXOsMuweZaiPEOnSONi+Go4OkUxi8ssXu1Nbc+Xjapt2BVHpnDH FnEtbcxtojB6TSnYDE7J7NJLhk1NmuDQc4S0UmXiEptVkKfNADJwGt0+/lZXf3Om lHFP2ob0pe8miN40RevZMNJBn+TSs6loR4X06YtcIXW7JctSjBF9CGB/1v2qr3k= =Pg9f -----END PGP SIGNATURE-----