Nervos launched in Nov 2019 and the first CKB halving is expected at Epoch 8760 (around Nov 2023).
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CKB uses the NC-Max consensus mechanism, a variant of Bitcoin's Nakamoto Consensus (NC). While retaining all of NC's advantages, NC-Max improves the performance limit and resistance to selfish mining attacks by adopting a two-step confirmation process.
NC-Max increases transaction throughput and decreases confirmation times. The network can handle around 100 to 200 transactions per second but also can increase its capacity as bandwidth and latency improve over time.
CKB uses a novel, simple hash function called the Eaglesong that lowers the barrier for ASIC manufacturing. CKB's design is ASIC neutral, and the first ASIC was released four months after the mainnet launch.