A Secure Self-Destruction Scheme with IBE for the Internet Content Privacy

With the rapid emerging of novelty Web services and cloud services,privacy information and documents of users become increasingly easy to be exposed in the Internet.To tackle the issue of lifecycle security of the privacy information and documents in the Internet,in this paper, we propose the idea of combining the three security methods of multilevel security,identity-based encryption(IBE),and distributed hash table(DHT)network.And we further propose an IBEbased secure self-destruction(ISS)scheme to protect the confidentiality and privacy of the Internet content by self-destruction after a predefined time.In our proposed ISS security scheme,the Internet content is first partitioned into many segments with diverse security levels,and each segment is encrypted with a symmetric key to obtain primitive ciphertext.By applying the methods of association and extraction,the primitive ciphertext is turned to associated ciphertext,which is then divided into extracted ciphertext and encapsulated ciphertext.The latter is encapsulated into the Internet content self-destructing object(CDO),which is stored into the storage services provider.Furthermore,to protect the privacy security when the CDO expired,the symmetric key is encrypted using the IBE algorithm based on the identity of the authorized user.The combination of this key's ciphertext and the extracted ciphertext,by means of Lagrange polynomial processing,generates mixture ciphertext shares.Then those shares are distributed into nodes within the DHT network and will be automatically discarded over the deadline when the primitive ciphertext and the symmtric key are unrecoverable.Consequently,the ISS scheme achieves the aim of secure self-destruction.Comprehensive analysis shows that the ISS scheme is able to satisfy all the design demands and is more secure than existing schemes.The ISS scheme can resist against not only the traditional cryptanalysis and brute-force attack,but also the Sybil attack(e.g.,hopping attack and sniffer attack)from the DHT network.