A Secure Document Self-Destruction Scheme with Identity Based Encryption

With the rapid emerging of the novelty Web services and cloud services, it becomes more and more easily to expose a user´s sensitive documents into the cloud. In this paper, we combine identity-based encryption (IBE) algorithm with distributed hash table (DHT) network and propose an IBE-based secure document self-destruction (ISDS) scheme to protect the privacy security of past, archived sensitive documents, and make sure that all copies of those documents become unreadable by making them utomatically destructed after a predefined time without any human intervention. Comprehensive analysis shows that the ISDS scheme is able to resist not only traditional cryptanalysis and brute-force attack, but also Sybil attacks (e.g., hopping attack and sniffer attack) in the DHT network. More significantly, our ISDS scheme can also provide fine-grained access control during the lifetime of the sensitive documents, which is not guaranteed in other existing schemes.