-----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-suitecrm-14.0-jessie-amd64.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-suitecrm-14.0-jessie-amd64.iso c8e9f51391a88d7f0a95dc26f1b047d7 $ sha1sum turnkey-suitecrm-14.0-jessie-amd64.iso ff326b10d5cf5ad7c79e38be58a7b971dd0f166a -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrqAAoJEIXCXpWhbrlN9l0IAON5Rn52sawZL/ko0iyMSIvj kjIf1OUkk1V0+iEI/BG32GesYvXsX096KKPlzFFbm+c88YDAEqxRHEcu7Pjegmql Ko0e83EqfrFuej4/z3iGuFr/NK6ErsSLnHin7UKI2PJtg868rAD5Xv0vOUa7AGVN gTGsT2S+9PoR1vcL30SNba9sBISU7WrqJlwe1HXfGwgHBdkU+BapUcch4DRW0Dzc +mc0fak7E+2w1D3FuCYvtU3TdBB+ARKCbYIbXYznxaSRS31dW2z6QYRIp4z/HFFM Ro/bQ2Sa6rUFUM4nHj8txRlvX8cDzdbtP18pQWH6Ysz2fk5eRLcG2zkZVTZY8OI= =eEsY -----END PGP SIGNATURE-----