Securing Portable Document Format File Using Extended Visual Cryptography to Protect Cloud Data Storage

With the vast development in cloud computing model, various organizations and individuals often deploy the cloud without reviewing the security policies and procedures which can cause great risk in their business. Securing data in cloud storage becomes a challenging task not only for the cloud user but also to the Cloud Service Provider (CSP). Storing secret data in unencrypted form is susceptible to easy access to both the unauthorized people and the CSP. Standard encryption algorithms require more computational primitives, storage space and cost. Therefore protecting cloud data with minimal computation and storage space is of paramount significance. The Securing Portable Document Format file Using Extended Visual Cryptography (SPDFUEVC) technique proposes efficient storage to achieve data confidentiality and integrity verification with minimal computation, time complexity and storage space.