-----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-silverstripe-14.1-jessie-amd64-vmdk.zip.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-silverstripe-14.1-jessie-amd64-vmdk.zip 1ddfb40a93adfc09cd75c6aa0f36ff47 $ sha1sum turnkey-silverstripe-14.1-jessie-amd64-vmdk.zip 3b74c5cf4ff8221b950cbe1b829ff9ebbee06ae0 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJn6AAoJEIXCXpWhbrlNLwUH/RoKR2Kx4g4z57VdStT56Ynz nyjaypgDjjUKTfu02zg3D2lh09qBPiCfUc6nPGSy/TKM/NcCONnFJAlk4CLUzXEH jf+Q2E+BVkVV+htFfu7l0VuaG692urkkM1TkIsAnjyJ+D/gIg6emBR/kjE5/Tiin J99HuQ3mGconZI9ktCKATjNHaUE06D+X18NBZzSdqGDd470mvGXAyK/RY3cq6cLf rD1fSSeZRMDJiBZyI+2mZjpg7nRcg3u8zJNeDLKhuIyGmGLIYLdOZkYDo2JzZY4Z Do5Tv9sT2LpGw87pJBlHzFkl2UboogeukjK/O0Nxa86YQWdh79VRWmzcqxXGz1k= =DZCf -----END PGP SIGNATURE-----