-----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-icescrum-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-icescrum-14.0-jessie-amd64.iso bc726b3c2ee74794d60f482b52ea2c36 $ sha1sum turnkey-icescrum-14.0-jessie-amd64.iso 812c018b913df58acbfb8675cc99bfe3e3a514ca -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrpAAoJEIXCXpWhbrlNyU0IAIQKH93cmBMa9qq2jlN45hPn oicpbBue7p1Q927Xb2qiXUsh+ZLb6a71A8UWKApmtNj6be0LdSm5UPh9HYUnDJ9G yRotjgAmRkWr9k53sgl5jmTF0aVEjo8lJvRot9F6epGl8WoUQrRE0nL6suJEnkar DniBzz/Qeg6H1sxRR/6ILVlEecHC7lNCGDU77bgGoMGhcvvixEXxjcResc/1OGE4 Br2Ourh8GRAc9FC9Sf9Nzfqi0j8Q+rs9vqIbTi6e/kfMfuwExdyMH37dbzFq9FFs fXYrcmIspyMWxwrVyJa2LWhASosTqSrSRGWPB//PaJ6cMKnpLbEkLSaNBBzKtsk= =Mvqn -----END PGP SIGNATURE-----