Researchers have made a breakthrough in quantum computing by demonstrating four-state discrimination for a pair of spin qubits using gate reflectometry, a technique that leverages the Pauli Spin Blockade (PSB) mechanism. This achievement is significant because it enables the readout of two bits of information from the two spin qubits involved in the process, a crucial functionality for scaled-up quantum computers. The PSB mechanism is expected to play a key role in the readout process of semiconductor-based quantum computers, which rely on single-electron spin qubits defined in quantum dots. By harnessing gate reflectometry, scientists can now extract more information from these qubits, paving the way for more efficient and reliable quantum computing1. This development has significant implications for the timeline of cryptographic migration, particularly in the context of quantum-resistant cryptography, making it essential for practitioners to prioritize planning for post-quantum cryptography.