The effort to build a fully functional quantum computer is one of the most exciting engineering challenges today. But with every new breakthrough comes the question of how quantum technology will affect security. If a quantum computer were to appear today, virtually all internet communication would become insecure. No matter how you cut it, quantum computing will have a profound effect on todays security infrastructure, authors say. The only primitives that really need fixing are digital signatures and public key encryption. Once these primitives are in place, all the important protocols can be made quantum-safe.”]
Source: https://securityintelligence.com/preparing-next-era-computing-quantum-safe-cryptography/