-----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-fileserver-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-fileserver-14.0-jessie-amd64.ova 1d26b75cb62ad0bcfab752c076aa6c0a $ sha1sum turnkey-fileserver-14.0-jessie-amd64.ova 77611565c25d24e4ba446fd8293af46786c16502 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWMJdWAAoJEIXCXpWhbrlNQ7gIAK2EvLK1R7c6nTuiL8FDtPhw dfvAmHnGY5aiWQxRKPTq9pfWQBpsAkTy+qE5+duaNvgLf6smD9bQ0157D6+KSRK6 Jd4EgrEgZ2QZy4NHbI7kcYhURIJ/tn98FeZx58IpfDCUmkg9xJ0ytmXXoXV/Rz80 Z8axTHFZpw1U+TCc61PCLWK30ShTIaeADyHbJ+fqTYkc1iy7tnhhjJfH57PJ4lCW iUMBVfFqAPpStoYuXaIb1LjBWaz6vlUPecGd0ZbSN1reKedGY4w0/2NHtN5CigEz s5gZ9KAnlAiNZcrnGIngYog7MnE5wUG01B0Ka2fgtptjvjDMuUOmM2OXtmSwOBo= =cTNr -----END PGP SIGNATURE-----