keyctl_reject(3) on Linux
The text 068c30603a93, as Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Assume the authority to instantiate a key keyctl_instantiate - Instantiate a key from flat data keyctl_instantiate_iov - Instantiate a key from segmented data keyctl_reject - Negatively instantiate a key specifying search error keyctl_negate - Negatively instantiate a key