English Language · English

The following sentence consists of an incomplete part that has been split into four jumbled parts labelled P, Q, R, S. Select the combination that correctly completes the sentence: The impending arrival of 'Shor's Algorithm' on a fault-tolerant quantum computer poses an existential threat to current digital security _______________________________________________ necessitating a global transition toward 'post-quantum' encryption standards. P. by demonstrating the theoretical capability to factorize large prime numbers at speeds unattainable by classical supercomputers Q. which would effectively render the ubiquitous RSA and Elliptic Curve cryptography obsolete overnight R. through the exploitation of quantum superposition and entanglement to solve mathematical problems that underpin modern internet privacy S. effectively creating a 'harvest now, decrypt later' risk where encrypted data is stolen today to be cracked in the future