PDV: Permissioned Blockchain based Personal Data Vault using Predictive Prefetching

Abstract

We predict that in the not-so-distant future, most if not all documents will no longer be available in paper format. We envision a world in which one can store the entirety of their digital documents not unlike a filing cabinet storing paper documents but with the additional security, safety, and integrity. The vision is encapsulated in our Personal Data Vault (PDV). The PDV is a framework for storing, saving, protecting, and sharing a person’s life-time digital documents in a verifiable secure manner that can ascertain a document’s authenticity and integrity and afford its owner to share it securely. In PDV, each document is encrypted, compressed, and securely stored in the cloud, and indexes are entered in disturbed ledger of a Permissioned Blockchain (Hyperledger Iroha), which significantly prevents data leakage, and the ledger is immutable and tamper-proof to maintain integrity. All access rights are written in the form of an access-list in Smart Contracts, which are later used for verification. We used the concept of predictive prefetching in combination with the Markov tree to design a model that successfully predicts the next (or sequence of next) requests that may occur and pre-executes (execute before the request has occurred)