"Lattice-based group encryptions with only one trapdoor" by Jing Pan, Jiang Zhang et al.
Group encryption (GE), the encryption analog of group signatures, is a fundamental primitive that offers a privacy-preserving service for a specific receiver concealed within a group of certified users. Like other cryptographic primitives, GE constructions are always considered relative to the potential danger of quantum computations. The only existing lattice-based variant appeared in the work of Libert et al. (Asiacrypt’16). Despite its non-trivial achievement, the construction suffers in terms of efficiency due to the extensive use of lattice trapdoors. In this paper, we develop an integr...
Source: uow.edu.au