-----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-simpleinvoices_14.0-1_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-simpleinvoices_14.0-1_amd64.tar.gz db5861a5310a62fb0b9deee6cba4b4cf $ sha1sum debian-8-turnkey-simpleinvoices_14.0-1_amd64.tar.gz 81c17aa387a001d1bf046d69f874df42e2ff768b -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWObxWAAoJEIXCXpWhbrlNlWAH/1AxbsKTI9EB8GZZsqHIWmO5 vltKQ3Z5PE6kztRw0uYujWkqsIL5eVJpeYFjUwspDHPl28fV24/y2lAgghIlr8cY yuOGa006cKpStBYxU8m9otY4HtiPpVEcBgCzmhhPIG/21NnVgGL8BVBcZ6/3OWNG sA6mUqr23ANTxxQmP7QePJQAob/ZbybGr3MJgybylFLNfItZVr6gKp6D8HHy0TA4 irt3PSIOXZOySQ/AMFs0u3ASBw6UNcwoZX8t13lKy4jX8jHCW1abaD4MPU5ooFIX 27IB8HZ7TB6c61fTb/tARTG3azFw0z//14Sa/slS6w2NRJSkW5aTGRb2sa7XNw8= =toLL -----END PGP SIGNATURE-----