Following the Binance hack, Coinbase emphasized its sharded key cold storage architecture, stating that 99% of customer assets are stored in cold storage. Binance's initial investigation indicated that the October 29th incident affected approximately $6.34 billion in digital assets, and as of October 31st, 98% of the affected tokens had been replenished. The sharded key design breaks down key materials, ensuring that no single entity or system possesses the complete key.