Key-Private Proxy Re-Encryption from Lattices, Revisited
Ryo Nishimaki, Keita Xagawa · IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences · 2015
We propose two unidirectional proxy re-encryption schemes from the LWE assumptions. The schemes enjoy key privacy defined by Ateniese, Benson, and Hohenberger (CT-RSA 2009), that is, a delegator and a delegatee of a re-encryption key are anonymous.