Cryptography keeps your data safe and the internet running. Quantum computers are coming to break it.

Quantum computers, capable of breaking the public-key cryptography that underpins the modern internet, do not exist.

Yet.

But that is all about to change.

So “not yet” is not the right frame. The relevant adversary does not need a quantum computer today. He only needs to be patient: to collect encrypted traffic now, store it, and decrypt it later, once the technology cooperates. “Harvest now, decrypt later” is not a speculative threat model but a rational strategy and almost certainly already happening. Any communication that must remain confidential for a decade or more is therefore a present-tense vulnerability. The threat is future; the organizational work is now, and most organizations are moving slowly.

The migration to post-quantum cryptography is the kind of story that resists being told.