Currently, replicated security is being used for the AEZ, a collection of blockchains centered around the Cosmos Hub. As of January 2024, Replicated Security is used to connect the Stride, Noble, and Neutron blockchains to the Cosmos Hub, allowing those three chains to have their transactions processed by the Cosmos Hubs validators set.
While the chains in the AEZ do more than just rent security from the Hub to align themselves, Replicated security at its core was developed as a solution to problem of how to spin up new PoS chains in a safe manner. PoS, or Proof-of-Stake, is the method by which many blockchains, including Cosmos ones, stay secure, decentralized, and trustworthy yet trustless.
This security is directly propotional to the how much value (often measured in terms of Fiat, like the USD) is staked to the blockchains validator set. Therefore, new chains often struggle with being secure at launch, as their native tokens are often lacking in value and/or isn’t porperly decentralized and distributed. With replicated security, a blockchain can have all the security of a giant network like the Cosmos Hub (and the $ATOM token) from day one.
