In Hyperledger Fabric, private data collections are designed to enhance privacy and confidentiality by allowing only specified members of a collection to access the stored data. These members are pre-configured when the private data collection is defined. While the actual data is restricted to these configured members, hash values of the data are distributed and stored on the ledger accessible by all organizations in the channel. This method ensures data confidentiality while still providing a way to verify data integrity across the entire channel, as other organizations can see the hash values but not the actual data itself​​.