Nir Bitansky: Verifiable Random Functions from Non-Interactive Witness . . . We present new constructions of VRFs from general primitives, the main one being non-interactive witness-indistinguishable proofs (NIWIs) This includes: - A selectively-secure VRF assuming NIWIs and non-interactive commitments As usual, the VRF can be made adaptively-secure assuming subexponential hardness of the underlying primitives