A CAS system uses the content itself as an address through a unique identifier, typically using a hashing algorithm performed against the content. That makes the content address unique. No two pieces of content have the same address unless the content is exactly the same.
Using content-addressing models provides three main benefits:
- The need for applications to understand the physical location of information is eliminated.
- A content address acts a digital fingerprint, which can be used for irrefutable authenticity during a legal or regulatory investigation.
- Digital fingerprints are used to identify and eliminate duplicate records, such as emails with attachments, which ultimately reduce archive capacity requirements.
Check out the entire CAS FAQ.