This document proposes and describes a new Map-Based Provable Multi-Copy Dynamic Data Possession (MB-PMDDP) scheme for cloud computing systems. The key points are:
1) It allows data owners to outsource and replicate dynamic/updateable data files across multiple cloud servers while provably ensuring the integrity and consistency of all file copies.
2) The verifier only needs to store and maintain a small amount of metadata (a map version table) to audit the integrity of all outsourced file copies, regardless of their number.
3) Authorized users can decrypt and access individual file copies obtained from the cloud servers using a single secret key shared with the data owner.