Improving Efficiency and Security Based Data Sharing in Large Scale Network
The Key Generation Center (KGC) could decrypt any messages addressed to specific users by generating their private keys. This is not suitable for data sharing scenarios where the data owner would like to make their private data only accessible to designated users key. To overcome this problem the authors propose escrow problem which means a written agreement delivered to a third party and Attribute-Based Encryption (ABE). Attribute-based encryption is a promising cryptographic approach, is a fine-grained data access control which provides a way of defining access policies based on different attributes of the requester, environment and the data object.