-----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-plone-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-plone-14.1-jessie-i386.iso 73b0b037f0ff86a00ff2536a2d061d32 $ sha1sum turnkey-plone-14.1-jessie-i386.iso e72e6957542615e19a3f9c9e7b7f93d02f46df32 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPzAAoJEIXCXpWhbrlN1NEIAObUf1/eNdAey8dq/NqfkNMi f8JRoIeFtp6cn6MdW6HuSD26Q0SGpE3S6lZQu5ondOuQ1QUkCpfs8a7jKY5pNpXT mTe+W6EcxgigI4VSlXqwVJ33NKblVKpvGpT0meePDLZ4ikY+Fn3Az8Zc73D5hOUw 7bxV8TFUdQ+MeOOKkVYD6X0od7gOcS3GSyY/uL7YVikDdP3smLJE4vNufGo3Lsor 41m4tbh1Jud+Pq+GSqKM5i2MNfEGL3jisIjGgpcfhQiW/Qp6HiBNp4ch5+N90CUI ufuxOxlbXKn0KOSat1/zXf6g0DD3eEjxZoquo/Vg3DxSFClYrgOdsX7vPwyCeLw= =zCls -----END PGP SIGNATURE-----