The development team behind Blast, a newly launched Ethereum Layer-2 solution, has responded to negative claims about the protocol’s security and operations. The protocol aims to offer users native yields on ETH and stablecoin deposits. However, a developer at Polygon raised concerns about Blast’s security model and its qualification as an L2 solution. The developer highlighted that Blast operates an upgradable security contract managed by a ⅗ multi-sig authorization model, which could pose a risk if a malicious third party gains control of the contract keys. Additionally, the developer noted that Blast lacks essential features such as a testnet, transactions, bridge, roll-up, and proof of data communication with Ethereum. Blast, in response, defended its security model, stating that an upgradable contract is superior to an immutable one in terms of complex operations. The development team also emphasized the strength of the multi-sig model, with all five keys kept in cold storage and managed by separate individuals in different locations.