The quantum internet will do something classical networks cannot do at all: distribute entanglement between cities, teleport quantum states, and detect interception at the protocol level. This explainer walks the whole stack for a legal and policy audience: teleportation, quantum key distribution over fiber and satellite, the NIST post-quantum standards, and the hybrid strategies that boards and ministries must adopt long before the network itself matures. The physics is subtle. The policy consequences are concrete and come with deadlines.
What Delft, The Hague and the Micius satellite have already demonstrated
The milestones are no longer thought experiments. In 2024, researchers entangled quantum processors in Delft and The Hague over 25 kilometers of ordinary underground telecom fiber, a genuine metropolitan quantum network link. China's Micius satellite has distributed quantum keys between ground stations 7,600 kilometers apart, securing a videoconference between Beijing and Vienna. The strategic significance of who builds and controls these networks is examined in the CNAS Entanglement Edge quantum networking report. Teleportation itself is routinely misread: it transfers a quantum state using entanglement plus a classical signal. No matter moves, nothing exceeds light speed, and the original state is destroyed.
Why the post-quantum deadlines exist years before the hardware
The urgency is cryptographic. A future quantum computer running Shor's algorithm breaks RSA and elliptic-curve encryption, and adversaries are already recording traffic to decrypt later, the harvest-now-decrypt-later attack. NIST answered in August 2024 with its first finalized post-quantum standards (ML-KEM, ML-DSA, SLH-DSA) and selected the code-based HQC in March 2025 as a future backup. Migration timelines from U.S. and European authorities cluster around 2030 to 2035. For long-lived data, interception already creates the confidentiality risk, because retained ciphertext may become readable later.
How layered security replaces the search for a single quantum fix
The central argument is architectural. Security in the quantum transition comes from hybrid strategies: classical plus post-quantum key establishment, AES-256 payload encryption, QKD only on high-value links where its trusted-node risks are consciously accepted, and crypto-agility as the governing design principle. The analysis closes with a concrete sequence for enterprises and governments: build the cryptographic inventory, triage data by confidentiality lifetime, write post-quantum requirements into procurement and audits, and run quantum-network pilots with candid trusted-node risk assessments. Read on to see how physics, standards, and statecraft interlock, and why the migration calendar is an obligation of today.
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