Quantum computing provides stable and highly controlled systems. This will incorporate the High-performance and secure quantum-resistant PQC protocol into the blockchain-based network management. The proposed PCQ blockchain system methodology provides significant resilience in complex quantum mechanisms to minimize the required time to initialize, generate the keys, and secure the system’s data, particularly against online attacks and virtual fake digital signatures. The experimental results explain the operational security strength of the PQC blockchain-based algorithm. These results show that PQC offers a higher confidence mechanism than the recent common algorithms in literature to initialize and prepare the transitional secured data with high transfer performance compared to the traditional Elliptic Curve Digital Signature Algorithm (ECDSA). PQC protocols using Module-Lattice-Based Key-Encapsulation Mechanism (ML-KEM) and Dilithium maintain high detection rates of 94%–96% while slashing quantum risk exposure by 90%, despite a temporary 10% false positive rate. Performance trade-offs are 50-percent more latency and a throughput that is 200 Transactions Per Second (TPS) caused by 10x to 40x-larger-than-classical signatures. Usually, implementation coverage starts at 70-80 because of hardware constraints, but provides a 250%-400% Return on Security Investment (ROSI) by averting complete cryptography collapse. Thus, the post-quantum cryptographic protocol mechanisms augmented the security against the malicious attacks and eradicated attacks altogether. This study explains the entropy strategies based on quantum verification, which is able to find the integrity of sensitive or unclear signatures. This method of PQC on blockchains suggests a trustworthy model that is balanced in terms of complex to be attacked, high-security, and high-performance systems.
