The biggest fear surrounding quantum computers, which are coming on in leaps and bounds , is that they will be able to smash through classical encryption , allowing anyone with a quantum computer to read any data protected by classical encryption methods. Microsoft, however, is not waiting for quantum computers to become widespread before it better protects users. At BUILD 2025 today, the company announced that it is integrating post quantum cryptography PQC into Windows Insiders Build 27852
