A blockchain transaction is more than a transfer of value. It carries proof of authorization. Digital signatures establish that proof. They help verify that a transaction was authorized by the holder of the expected private key and that the message hasn't been altered. Now consider what happens if quantum computing eventually undermines the cryptographic assumptions behind those signatures. The concern goes beyond someone accessing encrypted data. It reaches the foundation of transaction authorization, authenticity and trust. A system might still record transactions perfectly, but how reliable is that record if the mechanism used to authenticate the authorization becomes vulnerable? This is why the quantum transition needs to address more than encryption. Blockchain infrastructure also needs signatures designed to withstand quantum attacks. That's the challenge @quipnetwork is working on. The future of blockchain security depends not only on protecting what is stored, but preserving the ability to prove who authorized it.