Abstract: A computer-based apparatus for searching confidential documents, including a computer with a memory element and a processor to execute instructions stored in the memory to receive a confidential document and related non-confidential information from a source entity. The processor executes the instructions to: store the confidential document and non-confidential information in the memory element; and restrict access to the confidential document stored in the memory element to the source entity and a library entity only, or to the first source entity only. The processor executes the computer readable instructions to: receive a search request from a searching entity including a search parameter; identify the search parameter as being applicable to the confidential document; and transmit for access by the searching entity, the non-confidential information. The library entity is different from the source entity.