This module accepts ephemeral SIK3, SOK3, and CCK3 keys and provides SIKZ, SOKZ, CCKZ and ZMK keys that may be longer-lasting. SIKZ, SOKZ, and CCKZ obey the SIK3, SOK3, and CCK3 protocols respectively. The supported ("Z") keys are connected transparently to the provided ("3") keys with the following exceptions. The zapper module only signals EOF on SIKZ and SOKZ when the zapper module is destroyed (not when EOF is signalled from the "3" keys). If EOF is signaled by the user of the "Z" keys, communication is ended permanently, but EOF is not signalled to the "3" keys.

See (zmc) about new zapper modules.