Cosmos is a decentralized "layer 0" blockchain infrastructure designed as a technological foundation for building various specialized, interconnected, and interoperable blockchains. The core of the ecosystem is the Cosmos Hub, a central blockchain that uses the Tendermint consensus, a proof-of-stake type algorithm. Cosmos has also developed the Cosmos SDK, a toolkit that allows developers to easily create new custom blockchains. These blockchains communicate securely with each other through Inter-Blockchain Communication (IBC).