Multiple Authorities Attribute-Based Broadcast Encryption: Simulation & Implementation

Vishal M. Shah, Viral V. Kapadia

Abstract


sending a message is to only one recipient at a time is achieved by standard encryption techniques like public-key encryption and identity-based encryption. Similarly, Message needs to be transmitted to list of recipients, this can be achieved by broadcast encryption [4] approaches are used. On other hand, Attribute-Based Encryption (ABE) determines the capabilities decryption based on users attributes and access policy which is composed of one or more attributes. And also Attribute-based broadcast encryption removes the limitation of traditional Broadcast Encryption (BE) [4] by doing encryption based on Ciphertext policy Attribute-Based Encryption (CP-ABE) [2] by defining an attributes into the system. The new efficient ABBE reduces the size of ciphertext to a constant value [3]. This encryption-decryption technique is facilitated on single-authority attribute-based broadcast encryption approach. All attributes are monitored by single trusted party. Decryption keys are also issued. But there is an issue with this approach as if number of attributes is added into a system increases the size of the ciphertext. Because of this problem, burden of single-authority (single-key generator) increases. The primary objective is: Multiple Authorities Attribute-Based Broadcast Encryption scheme reduces burden of the single-key generator by having many authorities operating parallel, hence each different sets of attributes are handled by a secret keys. And also provides security against some attacks.


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