-----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-jenkins_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-jenkins_14.1-1_amd64.tar.gz c66f755c602a307a33e3a63373d54dfe $ sha1sum debian-8-turnkey-jenkins_14.1-1_amd64.tar.gz 90ae31a73a4e02a2abccc41f924f385056a16d2a -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJXDJnrAAoJEIXCXpWhbrlNVtcIAIRDfdsBF3RKd25FJGd6vj/K Mh5oQ9eBvCD6UgXpXd5Hb8WEnHX9/nFEi0YGmpVDz6uPKFSa094dIZ+QC4zbDpn/ My/OVAw3MnMyQlvc6szRDkypDK3HKcBajy6v/t04GvVmnNRS43i5qLnCf4sBhNa3 qYYOvNyn0Dyr9o788pH3A2r8rn7gVpfbw49wrW8sCKL9FWLaWq5c6UCYjUKLF1Kw O3N13t64u5xh8964nDbICX6QpDdZi0DtZoLmKM5d0XlyYid1lhNhmS55iPr3pXBz sIqGYazFvXWusDXA1vrCsmyVArOaKPnzu8Pra26Nu8rof6JLm9ubKBuq16q9SjU= =0CUZ -----END PGP SIGNATURE-----