-----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-tomcat-apache-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-tomcat-apache-14.0-jessie-amd64.iso 50395733eb1bd4aa3cdc5360643abbff $ sha1sum turnkey-tomcat-apache-14.0-jessie-amd64.iso 039930fadd3e5ae5572e72ee79670f34695adc80 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV7BrqAAoJEIXCXpWhbrlNH/QH/RgFGs5r1Bftr037ARXdkK8b +02xzFzi+ztIKKt6YXEg8fc2licx2kD8UNYs8BlLfV60R73ZrgaAalXJ1aUfEUDO q0mc9z640GDUO8KYf3eVcEy1u/eN6dMNcGsRh2veHWD2CZEEc23+lL/rDwIJWkbz oYqcuw07Dnl0r6lBNWdX/j1i07Q3MfbzLCnqaBg0xZtL1q6iqJnhafV7kMycLn0i hEvA5+iKXCk7aR88mWUOwDfxNOjefwmvB75GEf0cQdOeyZt8ioo6T++GSbaqnLwm 7tPu8UYk/pzDFMv36wg/RVlTlOSNJAE2l1Hx6/A+ElIT0g7bcJbV3/nZ8xzB+Y8= =IuQH -----END PGP SIGNATURE-----