elasticsearch/docs/reference/setup/install/key.asciidoc

We sign all of our packages with the Elasticsearch Signing Key (PGP key
https://pgp.mit.edu/pks/lookup?op=vindex&search=0xD27D666CD88E42B4[D88E42B4],
available from https://pgp.mit.edu) with fingerprint:

    4609 5ACC 8548 582C 1A26 99A9 D27D 666C D88E 42B4

Download and install the public signing key: