-----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-icescrum-14.1-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-icescrum-14.1-jessie-amd64.ova aa02d8252d9a249ea6399fad02e8284d $ sha1sum turnkey-icescrum-14.1-jessie-amd64.ova cbf4b64099128ccffd618ec032756acf359ba7ce -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnzAAoJEIXCXpWhbrlNyqUH/RYKDNdcvL3khpORdzqIa3Gn axM/qzYFTuL7Zsc9pphLexWcGYv1ekr4tFxQ7nChx8MDwJjHQTkJ8WfV6KqPuNhL slu65Ng3I4eR6FsItKBShQoufrioxo9C0As2soBJk3U/Z5Zocl5FR01atgfxX5vt RV38Ha9sjk0MDGahx/ShpBeH604+i1/7zv0kebOceLrEg8xoajNwOw111A8Ahkyw DxlNMHG/dJhPKE+7uBseHQN1x9sXgouOM4KakSUsmk1DieczZf+VZcSQUUwz4HOt b4uiQ8mG0FWtqTPHoY0WH/x0PwjrmFj96V9fJPvw4djF8u/QsN8kxH0c12gO1i4= =UdE+ -----END PGP SIGNATURE-----