Secure System for data sharing using Cipher-Text Policy Attribute Based encryption with Message Authentication Codes for Data Integrity
Ashwini Ahire, Prashant Jawalkar · 2015
Attribute based encryption (ABE) techniques to encrypt each message. Different from previous works in secure data outsourcing, it focuses on the multiple data owner scenario, and divides the users in the KGC system into multiple security domains that greatly reduces the key management complexity for owners and users. A high degree of user privacy is guaranteed simultaneously by exploiting multi-authority ABE public keys. The scheme also enables dynamic modification of access policies or file attributes, supports efficient on- demand user/attribute revocation and break-glass access under emergency scenarios. In the existing approaches they fully deal with the data security. Key escrow problem is resolved by a key issuing protocol. Second problem is that user revocation problem. The user revocation problem is solved by; if a user is revoked from some other attribute groups he/she can able to decrypt the information as long as his access policy is satisfied by the cipher text. Finally the solutions to the problems are only focused on data security during data sharing. But the highlighted problem is data integrity. In the existing approaches it doesn't deal any solutions or approaches to provide data integrity. Here proposed a new secure system which supports both data security and data integrity. For data security here use Cipher Text Policy-Attribute Based Encryption for secure data sharing. The data integrity problem is solved by the MAC mechanism. Message Authentication Code (MAC) Message Authentication Codes (MAC) is a method in which the integrity of data is checked using secret key that is shared between a sender and a recipient. Finally our proposed approach gives solution for the data security and data integrity.