-----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-oscommerce-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-oscommerce-14.1-jessie-i386.iso 876484de2a45ec494d0267e7c57a452f $ sha1sum turnkey-oscommerce-14.1-jessie-i386.iso 6e56cd861f263f1200593c76a37c63b8464c351a -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPzAAoJEIXCXpWhbrlNwCwH/3vHcGRr//jFRPKTSnrHBr+I 977eVC+ej2QqqyysvW4Qrn22vUT3GsG76HgujFCZo42RgoAntiJm6/Qm5vuMJ1AG V4+/1ANLgIDpUIqvaVqdMaa7qpHZp0h8EotJJ6xY8KbKBHNEJ9At5cBHXXHCCsFo j0oM0REsd/AA0SExoH5FmrA8G3jr84DwQU60kDzJTiVPRbA9nbVgwJ39QpSxN5Ly s/cJtvH0Wdj9CR1H2HzlwRnVALvgmIkWeXbfUq23LxOks+i8/pFdavzheG8ypxHq UgZtQnzmRSAoH1jsP8AXYBi2+z+leAhxzSibYyjh9Jp5LOqDsuQKGlGviVfwgII= =fD6N -----END PGP SIGNATURE-----