A Secure Self-Destruction Scheme for Composite Documents with Attribute Based Encryption
Xiong Jin-b · Dianzi xuebao · 2014
In order to protect the confidentiality and privacy security of the composite documents within the whole life cycle,we leverage attribute-based encryption(ABE)algorithm to propose a secure self-destruction scheme for composite documents,referred to as SelfDoc.We firstly set up a new composite document structure by employing the idea of multilevel security,and then,use an access key to encrypt the composite document and the ABE algorithm to encrypt the access key.After a series of algorithms for extracting and transforming from the two ciphertexts,we obtain ciphertextshares and encapsulated self-destruction object,both of which are stored into two distributed hash table(DHT)networks and cloud servers respectively.Nodes in the DHT networks will self-discard the ciphertext shares periodically,so the original ciphertext and access key are unrecoverable after the expiration time,and the function of secure self-destruction is achieved.Compared with existing schemes,the security analyses indicate that SelfDoc scheme is able to resist the traditional cryptoanalysis or brute-force attack,and the Sybil attacks from the DHT networks.