-----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-silverstripe-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-silverstripe-14.1-jessie-amd64.iso 516179d81b8c8be11eab951bc66990fc $ sha1sum turnkey-silverstripe-14.1-jessie-amd64.iso 2ae515a679c12b9806d20b3f46cf34168305e9d9 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP0AAoJEIXCXpWhbrlNL4oH/3ok3JxuY9vJ0LaSIyEzoKyj NK/CpZq9/he7twyCmq21F+jyowaWUZ46LfrEBynl+8nnLUfkEZvm6RrO+sWXXZuv kYVwZBZbbkyiH5HreLXlzVl2z4BCT/zLwzN22mVuqH33Pv+9zuunXDwMS5ZMDBSu L1m/SfPJ3ahtX6lrSkDgNAJWpsXudFxn5bqDJ8ugujbxKeoWpNrm3tWb6ILuHqjq SGGbQZqxb/r3YPDtIGyi8h9Sj5AiBuWTjK4fz2NZnUj9v2db986zdOFxk/VqD0AJ JG1OVvASDjCuozfEeP6LHIdxzf7a7MQ4jShljHyKyA1t1KUlGw5MoFgPXSYVwGs= =i7Th -----END PGP SIGNATURE-----