Data input from multiple sites are collected and shared, using identifiers to maintain a link to sensitive portions of the data that were collected, without initially sharing the sensitive data. Unique record identifiers and parsed structure data information (PSD-Info) are used in connection with a checksum when sharing information without disclosing all of the sensitive data. Any shared subset data and the PSD-Info are encrypted with a private key and transmitted to a data recipient, who decrypts the information with a public key, verifying the identity of the sender. If later agreed by the parties, the sensitive data can be similarly transmitted. Maintaining a link between the shared information and the sensitive data that are withheld for confidential and privacy reasons provides proof for audit purposes, without disclosing the withheld data.