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The existing proxy signcryption schemes based on bi-linear pairings were proved to be insecure in quantum computing environment.Lattices are characterized by simple operations and difficult problems on it are hard to crack.In order to resist the quantum attack,we presented an identity-based proxy ring signcryption scheme that is provably secure under the standard model by using the Ducas ideal lattice technology,which is based on the assumption of the hardness of lattice problem SIS.