-----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-yiiframework-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-yiiframework-14.1-jessie-i386.iso b596db2e7b0b22fee1e049387e83f918 $ sha1sum turnkey-yiiframework-14.1-jessie-i386.iso 4a909a3b30db10af20d0e074b8181e10d6ec6e49 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkP1AAoJEIXCXpWhbrlNTtoIALGALZwUVBL3q66EyrZNfWQx 9CgdAD9m/LZPuCaERrCrVKSiARBqbxT30XoVYLbR+3UXwdOZ6t84PJMHBIJni+X+ QE6wEj4TL4oOSxgj0nHx4jka9H2c85/Et8OgEMJ6vQufPSY3c6vEGj4W3CWcb7LQ qMn+cLc/uGM5O1ZGVOKuULbJI436VGPvV2FkUV9Wk6pxTFM4Ft2LfZMi9LEIX4yU +IM3Vk8lUe0coMz+OQb1A/u2+Mc/pERN51xpTMBZD17kmoiV33Jv+C7CLxJMXq5R Ead7Zi/GWU92ixj3omEms8vbweXLeQrQxQgqS3HLdFit5Q8IbPsGR/wJxKRv5ds= =5dQa -----END PGP SIGNATURE-----