As quantum computing advances threaten to break current public-key cryptography, Canadian researchers and companies are developing quantum-safe cryptographic systems and protocols. The Institute for Quantum Computing at the University of Waterloo, along with industry partners, is working on both post-quantum classical algorithms and quantum key distribution (QKD) systems. Several Canadian institutions contributed to NIST's post-quantum cryptography standardization process.
Quantum-safe cryptography matters because the "harvest now, decrypt later" threat is already real — adversaries may be capturing encrypted communications today to decrypt them when quantum computers become powerful enough. Financial systems, government communications, and critical infrastructure all depend on cryptographic methods that quantum computers will eventually break. The transition to quantum-safe systems must begin well before quantum computers reach that capability.
Canada's position is uniquely strong because the same ecosystem that builds quantum computers also understands quantum threats to cryptography. This dual expertise — in both offense (building quantum computers) and defense (protecting against them) — gives Canadian companies and researchers a credible voice in global cryptographic standards. The Waterloo ecosystem specifically houses overlapping communities of quantum computing engineers and cryptographers, enabling rapid translation between threat analysis and defensive solutions.