In Hyperledger Fabric, what data structures manage sensitive information between organizations?

In Hyperledger Fabric, "private data collections" are used to manage sensitive information between organizations. This feature allows specified subsets of data to be shared among a defined group of network participants while keeping it hidden from others, thus maintaining confidentiality and privacy across the network. Private data collections enable organizations to transact privately without having to establish a separate channel, significantly reducing the overhead associated with channel management .