keyctl_negate(3) on Linux
The text c6eae5bbc958, as Debian 7 (Wheezy) 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