Content Addressable Storage (CAS) provides a mechanism for businesses to upload and protect fixed content, documents that should never change, on electronic media.
Items like x-rays, invoices and medical records are written once and should never be changed. When they are created and stored on electronic media, controls must be in place to preserve them and provide evidence of their authenticity.
CAS tools use encryption protocols to provide a unique “address” for each file based on it’s content and other identifying information about the file. This record provides assurance that the file has not been changed.
Typically, these tools also provide redundancy and other methods to protect availability as well as access control systems for confidentiality and audit.