-----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 debian-8-turnkey-fileserver_14.1-1_amd64.tar.gz.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 debian-8-turnkey-fileserver_14.1-1_amd64.tar.gz 673f093c66be51b00d39dafb02482edd $ sha1sum debian-8-turnkey-fileserver_14.1-1_amd64.tar.gz aa13df3267510ee2b8ea81e67722c75aace8a6e6 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnqAAoJEIXCXpWhbrlNJp4H/1zol4yGTKDyY9ljr4KQ27sq ZI4bqs5QJyM57tPPMbIc8cULfMQhOkW3P6x7nNWqzNuW90cxgcoNdtiCzowWIeEv 3N+0+2Xyhl9VQ9Q11p3wjP86Q4HS/+g7aouIRb0HZ9u2ettLpS3zLw9z0AGR+MGR sR2XNgsZWSIq43fMp4PKsPRTWMXhIHQndHYsTHvWiuTnURlwJnNxgw7Jp1KWwC3U r7YuQc59W3XRc7/1eZtwP/aVz+w+rkx2CRirY3TE0QCi7hvCFjdGA5prWc3rnaXQ KZUrSOpSfy7LuWv88HMhXh2U1VC5fsd6Z6yofMSbiNG4CrmudSeOCEhzs4BZ974= =6ttA -----END PGP SIGNATURE-----