Why the switch matters
Quantum computing isn't a distant threat anymore. Researchers are making steady progress, and the day when a machine can crack RSA or elliptic curve cryptography might come sooner than many expect. Ethereum's current setup relies on Poseidon, a hash function built for zero-knowledge proofs. It's fast and efficient, but it hasn't been through the wringer of decades of cryptanalysis. The move to proven standards is a bet that security will outlast speed.
Back's endorsement
Back has been a fixture in crypto since the 1990s, when he proposed Hashcash, the precursor to Bitcoin's mining algorithm. He's not known for cheerleading every trend. So when he backs a change, it carries weight. His support for Ethereum's post-quantum pivot signals that even the old guard sees the need to prepare. It also gives the transition a credibility boost among skeptics who might have questioned the network's direction.
Inside the technical shift
Poseidon was designed to be efficient in zero-knowledge circuits
