sq-key-attest-certifications(1) on Linux
The text 5550ad50ec99, as Debian 11 (Bullseye) shipped it.
Attests to third-party certifications allowing for their distribution To prevent certificate flooding attacks, modern key servers prevent uncontrolled distribution of third-party certifications on certificates. To make the key holder the sovereign over the information over what information is distributed with the certificate, the key holder needs to explicitly attest to third-party certifications. After the attestation has been created, the certificate has to be distributed, e.g. by uploading it to a keyserver.
Flags it lists
-
--output -
-o