:

Legacy industrial machines (CNC, medical imaging, textile looms) run on software from 2005. Those software keys were plugged into parallel ports or USB 1.0. When you upgrade to a new PC, the old driver bluescreens.

Authors : Ilaria Chillotti, Nicolas Gama, Mariya Georgieva, Malika Izabachène Venue : ASIACRYPT 2022 Summary : Presents a method to convert TFHE into a multi-key variant, allowing homomorphic computations on data encrypted under different keys without intermediate decryption.

Ensure the column in the parent table (the one you are pointing to) is marked as PRIMARY KEY or UNIQUE .

: This term could refer to a product, a software tool, or a feature within a system that allows for multiple keys or inputs. Without more context, it's hard to say exactly what "multikey" refers to here.