Researchers have investigated the resilience of a specific four-qubit ZZ quantum kernel on IBM Quantum hardware, focusing on its ability to preserve the underlying geometry of a dataset. The study utilized a fixed-subset diagnostic approach, examining the kernel's performance across three distinct execution configurations: baseline, dynamical decoupling, and gate twirling. The kernel was tested on a dataset comprising 24 real indoor air-quality samples, with each circuit executed 1024 times on the ibm_fez hardware. The results provide insight into the kernel's robustness and its capacity to maintain the intended geometry, which is crucial for quantum-kernel methods to function effectively1. This research has significant implications for the development of quantum-resistant cryptography, as advancements in quantum computing, such as those made by IBM, are narrowing the timeline for cryptographic migration, thereby increasing the urgency for organizations to plan their post-quantum cryptography strategies.