Is Your Blockchain Quantum-Ready?

Quantum computing risk is not tomorrow's problem anymore. With NIST's first production PQC standards now approved, the migration path is getting clearer while timelines feel tighter than before. Organizations are already being told to begin the shift to post-quantum cryptography (PQC), and that turns the concept of quantum secure cryptocurrency from a branding phrase into an implementation test.

Investors and developers need a plain-English way to compare quantum-ready blockchains, so we've compiled a reference table that does just that. Below, you'll find every major blockchain that claims to support post-quantum cryptography, along with their actual implementations, signature choices, and standardization status. This is not marketing copy—it's a technical assessment designed to help you separate the signal from the noise.

The focus here is on signature schemes because they're the most immediate quantum vulnerability for most blockchains. While other cryptographic components (like key exchange and hashing) will also need quantum-resistant upgrades, digital signatures handle transaction authorization and are where quantum attacks will likely hit first and hardest.