  Researchers are today exploring models for cloud-based usage of quantum
computers where multi-tenancy can be used to share quantum computer hardware
among multiple users. Multi-tenancy has a promise of allowing better
utilization of the quantum computer hardware, but also opens up the quantum
computer to new types of security attacks. As this and other recent research
shows, it is possible to perform a fault injection attack using crosstalk on
quantum computers when a victim and attacker circuits are instantiated as
co-tenants on the same quantum computer. To ensure such attacks do not happen,
this paper proposes that new techniques should be developed to help catch
malicious circuits before they are loaded onto quantum computer hardware.
Following ideas from classical computers, a compile-time technique can be
designed to scan quantum computer programs for malicious or suspicious code
patterns before they are compiled into quantum circuits that run on a quantum
computer. This paper presents ongoing work which demonstrates how crosstalk can
affect Grover's algorithm, and then presents suggestions of how quantum
programs could be analyzed to catch circuits that generate large amounts of
crosstalk with malicious intent.
