-----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-rails-14.0-jessie-amd64.ova.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-rails-14.0-jessie-amd64.ova 4e51a7c3eef51b7ad65f19a4f5681d46 $ sha1sum turnkey-rails-14.0-jessie-amd64.ova 32d77b226c08696bff360d69ce737c4138ab9aae -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMJdZAAoJEIXCXpWhbrlN6XoIAL8nVAWFcHqfP/XBk+fotMN3 pzJcq9aNSaPRg67LqDCzolacV8Hvy1Bt0MMnMUZh3GLiKCr/77iajox4CcjyGmid a6LZxSssBbJW9cC6OaiRKJPxcr4Mz/vvXqFXZdivxZmsxczXpWR8b85e8auUsVJ+ GFg95eh6sbkqegj2luSeJSgznT4z2L51ty9LuzTMCfNgFzhZmMqjRQgdqJNJbQ+m pt3kUEvq78aYmcxP5dd63oDk0jPpT3iTveWdgPCNYYDZ7MBlmpaeXblTJXBZhErv tFilDYpb2tV3pAEdbdaVYYy3jwTa38aRzyaUUAoIXreCsA/49slshFRY4ETpjYs= =dT5V -----END PGP SIGNATURE-----