Windows Servers Are a Cryptographic Liability: Entire Countries Can Be Left Exposed to Quantum Attacks

Windows servers rely on Schannel for TLS, a built-in OS component that developers cannot upgrade or replace, leaving PQC adoption entirely in Microsoft's hands. In contrast, Linux, Go, and Rust ecosystems allow independent cryptographic library upgrades, enabling early migration to post-quantum algorithms. This asymmetry means entire countries heavily dependent on Windows infrastructure could remain exposed to quantum 'store now, decrypt later' attacks if Microsoft delays PQC rollout.