Large Universe Attribute-Based Encryption Scheme from Lattices
This provides a quantum-resistant ABE solution for secure data access control, though it is incremental as it adapts existing ideas to a new cryptographic setting.
The authors tackled the problem of constructing a large universe attribute-based encryption (ABE) scheme resistant to quantum attacks by extending ideas from bilinear map-based schemes to lattice-based cryptography, resulting in the first such lattice-based scheme with short master keys and efficient ciphertext structure. They proved its security under the Learning with Errors assumption against select attribute attacks.
We propose a large universe attribute-based encryption (ABE ) scheme from lattices. It is inspired by Brent Waters' scheme which is a large universe attribute-based encryption using bilinear map. It is a very practical scheme but this scheme may not be security with the developing quantum computer. So we extend their good idea of large universe attribute-based encryption to lattices based cryptosystem. And our scheme is the first large universe ABE scheme from lattices. In a large universe ABE system any string can be used as attribute and attributes need not be determined at system setup. This is a desirable feature. And the master private key of our scheme is too short too a matrix. Moreover, our scheme is high efficient due to the ciphertext of our scheme is divided into three parts. Finally, under Learning with Errors assumption, we prove our scheme is secure under the select attribute attack.