Identity-Based Broadcast Encryption with Constant Size Ciphertexts and Private Keys
نویسنده
چکیده
This paper describes the first identity-based broadcast encryption scheme (IBBE) with constant size ciphertexts and private keys. In our scheme, the public key is of size linear in the maximal size m of the set of receivers, which is smaller than the number of possible users (identities) in the system. Compared with a recent broadcast encryption system introduced by Boneh, Gentry and Waters (BGW), our system has comparable properties, but with a better efficiency: the public key is shorter than in BGW. Moreover, the total number of possible users in the system does not have to be fixed in the setup.
منابع مشابه
New Identity-based Broadcast Encryption with Constant Ciphertexts in the Standard Model
How to build an efficient identity-based broadcast system with short ciphertexts is a main challenge at present. The existing constructions with constant size ciphertexts in the standard model are based on the non-standard cryptography assumption. In addition, these constructions cannot solve the trade-off between the private keys and ciphertexts. Hence these methods lead to schemes that are so...
متن کاملEfficient Identity-based Broadcast Encryption without Random Oracles
We propose a new efficient identity-based broadcast encryption scheme without random oracles and prove that it achieves selective identity, chosen plaintext security. Our scheme is constructed based on bilinear Diffie-Hellman inversion assumption and it is a good efficient hybrid encryption scheme, which achieves O(1)-size ciphertexts, public parameters and constant size private keys. In our sc...
متن کاملEfficient Dynamic Data Encryption Algorithm for Mobile Ad Hoc Network
Two proper threshold broadcast encryption schemes are proposed for the mobile ad hoc network. The initial scheme achieves constant size private keys and O(n-t)-size ciphertexts. Under n+1-Decision Bilinear Diffie-Hellman Exponent (n+1-BDHE) assumption, it is provable security in the selective-identity model. Based on the dual system encryption, we propose our main construction. It also has cons...
متن کاملForward-Secure and Searchable Broadcast Encryption with Short Ciphertexts and Private Keys
We introduce a primitive called Hierarchical Identity-Coupling Broadcast Encryption (HICBE) that can be used for constructing efficient collusion-resistant public-key broadcast encryption schemes with extended properties such as forward-security and keyword-searchability. Our forward-secure broadcast encryption schemes have small ciphertext and private key sizes, in particular, independent of t...
متن کاملAchieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption
In this paper, we present two non-zero inner-product encryption (NIPE) schemes that are adaptively secure under a standard assumption, the decisional linear (DLIN) assumption, in the standard model. One of the proposed NIPE schemes features constant-size ciphertexts and the other features constant-size secret-keys. Our NIPE schemes imply an identity-based revocation (IBR) system with constant-s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007