Quantum Computing Threat Spurs Encryption Overhaul in Space and Crypto

Advances in quantum computing are closing in on the ability to break widely used public‑key cryptography. Governments and commercial operators are now preparing for the fallout in sectors that rely on long‑lived encrypted communications.

In the space industry, satellites and ground systems that were designed to operate for decades cannot easily update their cryptographic algorithms. Experts warn that a "harvest‑now, decrypt‑later" approach could allow adversaries to capture satellite data today and decode it once quantum computers become capable. Agencies such as the U.S. National Institute of Standards and Technology (NIST) have released post‑quantum cryptographic standards, and the U.S. National Security Agency (NSA) is directing national‑security systems toward crypto‑agility to enable future algorithm swaps.

The cryptocurrency market, valued at about $2 trillion, also faces exposure because blockchains rely on decades‑old elliptic‑curve cryptography. Research suggests that up to half of Bitcoin’s circulating supply could be vulnerable if a quantum computer capable of breaking encryption appears as early as 2029, a timeline cited by Google. Crypto firms and blockchain developers are drafting plans to adopt quantum‑resistant cryptography, a multi‑year effort that may require substantial changes to network infrastructure.