-----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-mongodb-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-mongodb-14.0-jessie-amd64.iso 0edf5628530a2105c7302b3b8bd6771b $ sha1sum turnkey-mongodb-14.0-jessie-amd64.iso 311275c9e03e8af20be8e2f3f0d88a9798a11cc0 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJWXYG+AAoJEIXCXpWhbrlN/L8IAJXWitcTuwDis4d1wMnO7FCZ cWbOBpgPRdNolKGNCYmxMWV5U6HJcOatVLzeo2TcIZru4hgay7I36rJEcpBw0Hnp UnL17wM3tI2K0rnJ7rXXXZPe7ZAm+bkpSzymfJ5oQ7hHpsH5JjnNkP9GWgM1RoEo i0PDKApt0vpuDKGVV6crxjUZiFfkfklYzPDo9E3JonViR7W0ti84E3zsWEtGWhom t9UUEwQFxvspSkeS3EYG2JIPzSotSrsMSpYM9OdF4/KljUoXdPJpA2BSYd5pyBLA kfvwPhY9OaiSM66/3v5tR9BMrSeNXpYdj7lxKnFmlko1x5+qAX/FW78RT+4tZ8o= =vFrV -----END PGP SIGNATURE-----