05-11-2012, 04:41 PM
A SECURE DECENTRALIZED CODE-BASED DISTURBED STORAGESYSTEM FOR SECURE DATA FORWARDING
A SECURE DECENTRALIZED CODE-BASED .pptx (Size: 81.46 KB / Downloads: 25)
Proposed system
In this paper we propose a new threshold proxy re-encryption scheme and integrate it with a secure decentralized code to form a secure distributed storage system.
. The encryption scheme supports encoding operations over encrypted messages and forwarding operations over encrypted and encoded messages.
The tight integration of encoding, encryption, and forwarding makes the storage system efficiently meet the requirements of data robustness, data confidentiality, and data forwarding.
Accomplishing the integration with consideration of a distributed structure is challenging.
Our system meets the requirements that storage servers independently perform encoding and re-encryption and key servers independently perform partial decryption.
Advantages
The main technical contribution is that the proxy re-encryption scheme supports encoding operations over encrypted messages as well as forwarding operations over encoded and encrypted messages.
Our method fully integrates encrypting, encoding, and forwarding.
We analyze and suggest suitable parameters for the number of copies of a message dispatched to storage servers and the number of storage servers queried by a key server.
These parameters allow more flexible adjustment between the number of storage servers and robustness.
We consider the system in a more general setting than previous works. This setting allows more flexible adjustment between the number of storage servers and robustness.