# Signing key Each released Stack executable is signed with either: * the GPG key with ID 0x575159689BEFB442; or * the GPG key of a person that has been authorised by the GPG key with ID 0x575159689BEFB442. The signature is in an `*.asc` file. For example: ~~~text stack-2.7.5-linux-x86_64-bin stack-2.7.5-linux-x86_64-bin.asc ~~~ The signature can be verified with GPG, as follows: ~~~text # Receive the public key from a keyserver gpg --keyserver keyserver.ubuntu.com --recv-keys 0x575159689BEFB442 # Get information about the key gpg --keyid-format long --list-keys 0x575159689BEFB442 pub rsa2048/575159689BEFB442 2015-06-02 [SC] C5705533DA4F78D8664B5DC0575159689BEFB442 uid [ unknown] FPComplete sub rsa2048/85A738994664AB89 2015-06-02 [E] # Attempt to verify the file using the signature file. The public key has not # yet been certified with a trusted signature. gpg --verify stack-2.7.5-linux-x86_64-bin.asc stack-2.7.5-linux-x86_64-bin gpg: Signature made 06/03/2022 15:15:21 GMT Standard Time gpg: using RSA key C5705533DA4F78D8664B5DC0575159689BEFB442 gpg: Good signature from "FPComplete " [unknown] gpg: WARNING: This key is not certified with a trusted signature! gpg: There is no indication that the signature belongs to the owner. Primary key fingerprint: C570 5533 DA4F 78D8 664B 5DC0 5751 5968 9BEF B442 ~~~ The GPG key with ID 0x575159689BEFB442, and keys it has signed, have been uploaded to the [Ubuntu Keyserver](https://keyserver.ubuntu.com/pks/lookup?search=0x575159689BEFB442&fingerprint=on&op=index). This is the public key block for GPG key ID 0x575159689BEFB442: ~~~text -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1 mQENBFVs+cMBCAC5IsLWTikd1V70Ur1FPJMn14Sc/C2fbXc0zRcPuWX+JaXgrIJQ 74A3UGBpa07wJDZiQLLz4AasDQj++9gXdiM9MlK/xWt8BQpgQqSMgkktFVajSWX2 rSXPjqLtsl5dLsc8ziBkd/AARXoeITmXX+n6oRTy6QfdMv2Tacnq7r9M9J6bAz6/ 7UsKkyZVwsbUPea4SuD/s7jkXAuly15APaYDmF5mMlpoRWp442lJFpA0h52mREX1 s5FDbuKRQW7OpZdLcmOgoknJBDSpKHuHEoUhdG7Y3WDUGYFZcTtta1qSVHrm3nYa 7q5yOzPW4/VpftkBs1KzIxx0nQ5INT5W5+oTABEBAAG0H0ZQQ29tcGxldGUgPGRl dkBmcGNvbXBsZXRlLmNvbT6JATcEEwEKACEFAlVs+cMCGwMFCwkIBwMFFQoJCAsF FgMCAQACHgECF4AACgkQV1FZaJvvtEIP8gf/S/k4C3lp/BFb0K9DHHSt6EaGQPwy g+O8d+JvL7ghkvMjlQ+UxDw+LfRKANTpl8a4vHtEQLHEy1tPJfrnMA8DNci8HLVx rK3lIqMfv5t85VST9rz3X8huSw7qwFyxsmIqFtJC/BBQfsOXC+Q5Z2nbResXHMeA 5ZvDopZnqKPdmMOngabPGZd89hOKn6r8k7+yvZ/mXmrGOB8q5ZGbOXUbCshst7lc yZWmoK3VJdErQjGHCdF4MC9KFBQsYYUy9b1q0OUv9QLtq/TeKxfpvYk9zMWAoafk M8QBE/qqOpqkBRoKbQHCDQgx7AXJMKnOA0jPx1At57hWl7PuEH4rK38UtLkBDQRV bPnDAQgAx1+4ENyaMk8XznQQ4l+nl8qw4UedZhnR5Xxr6z2kcMO/0VdwmIDCpxaM spurOF+yExfY/Chbex7fThWTwVgfsItUc/QLLv9jkvpveMUDuPyh/4QrAQBYoW09 jMJcOTFQU+f4CtKaN/1PNoTSU2YkVpbhvtV3Jn2LPFjUSPb7z2NZ9NKe10M0/yN+ l0CuPlqu6GZR5L3pA5i8PZ0Nh47j0Ux5KIjrjCGne4p+J8qqeRhUf04yHAYfDLgE aLAG4v4pYbb1jNPUm1Kbk0lo2c3dxx0IU201uAQ6LNLdF/WW/ZF7w3iHn7kbbzXO jhbq2rvZEn3K9xDr7homVnnj21/LSQARAQABiQEfBBgBCgAJBQJVbPnDAhsMAAoJ EFdRWWib77RC3ukH/R9jQ4q6LpXynQPJJ9QKwstglKfoKNpGeAYVTEn0e7NB0HV5 BC+Da5SzBowboxC2YCD1wTAjBjLLQfAYNyR+tHpJBaBmruafj87nBCDhSWwWDXwx OUDpNOwKUkrwZDRlM7n4byoMRl7Vh/7CXxaTqkyao1c5v3mHh/DremiTvOJ4OXgJ 77NHaPXezHkCFZC8/sX6aY0DJxF+LIE84CoLI1LYBatH+NKxoICKA+yeF3RIVw0/ F3mtEFEtmJ6ljSks5tECxfJFvQlkpILBbGvHfuljKMeaj+iN+bsHmV4em/ELB1ku N9Obs/bFDBMmQklIdLP7dOunDjY4FwwcFcXdNyg= =YUsC -----END PGP PUBLIC KEY BLOCK----- ~~~