Post-Quantum Cryptography: Preparing for the Quantum Era
Published on 21 October 2026
Executive Summary
Quantum computers powerful enough to break today’s public-key encryption (RSA, ECC and Diffie-Hellman) are no longer a distant concern. Adversaries are already intercepting and storing encrypted data to decrypt once that capability arrives. For critical infrastructure like the energy grid, where data and devices stay in service for decades, the risk exists today.
This white paper explains the quantum threat and introduces the lattice-based mathematics behind the new NIST standards: ML-KEM, ML-DSA and SLH-DSA. It maps migration timelines across India, the EU, the UK, Australia, Singapore and Malaysia, which converge on 2030–2035, with earlier deadlines for critical systems. It also looks at what post-quantum security means in practice for smart meters, which face tight limits on bandwidth, memory and power.
The paper defines what makes a meter “PQC ready” and describes how Kimbal is building quantum-safe Advanced Metering Infrastructure. This includes post-quantum secure boot, signed firmware updates, hybrid meter-to-HES communication, quantum-safe provisioning at manufacture, and integration with the DLMS/COSEM protocol.
What you’ll learn
- Why “harvest now, decrypt later” makes post-quantum migration urgent today
- The NIST PQC standards and how they compare to classical algorithms
- Global regulatory timelines, including India’s roadmap for critical infrastructure
- The practical challenges of deploying PQC on resource-constrained smart meters
- Five immediate steps organisations can take to begin their migration
