-----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-espocrm-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-espocrm-14.1-jessie-i386.iso 10987d774aead41cfc67a47728ab4fab $ sha1sum turnkey-espocrm-14.1-jessie-i386.iso b31125dd682667bc3aa321c914b6e89650b4c38b -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXCkPxAAoJEIXCXpWhbrlNO/AIAKTAb4McUMxJeFbKxmPGY2wH JEBeA5t4vsjtkm6jHb+CEZ016x2RCueY2Rloy0e1Am5vjNChVjzizV/ZWn93Z2nc ZIZsmKT7bI6Rg1SmBmBlejv+84mtxaxLN5Yezbn9shn3szm+K8ywCBzoo9t98N0t 7btnc/9PZLF2h544CniaRRd0PnJp/OjgvrnllKsaeTHyUhHHyLQ5LHFPiKD7Nsln OlL8kl1YRiVltHPbr88RvFG/u4np2FRk65HaPxNe2Yfq0vRS+IbGv8w1ZU+pGjK/ PNUl3fkt7v3vTAOHNr7JEmRn0CNsJwK5il4sC1yIZGeXOc99Dzl5dQnuJdE3v0Y= =fjbW -----END PGP SIGNATURE-----