Interchain Security (ICS) is an advanced open-source IBC application designed to enhance blockchain interoperability within the Cosmos ecosystem by enabling blockchains to lease their proof-of-stake security to each other. This implementation facilitates seamless collaboration among Cosmos blockchains, bolstering their security infrastructure without sacrificing decentralization. Developed with precision, ICS is compatible with OSX and Linux, requiring Go 1.21, with optional tools like jq and Docker for enhanced testing and integration capabilities. Users can effortlessly install and run the provider (interchain-security-pd) and consumer (interchain-security-cd) binaries through straightforward commands. For those interested in testing and further exploration, comprehensive documentation—including the technical specifications, active releases, and major features—are accessible, providing extensive resources to maximize the benefits of the Interchain Security protocol.