  Continuous variable quantum cryptography has developed rapidly in recent
decades, but how to verify identity in the continuous variable quantum system
is still an urgent issue to be solved. To solve this problem, we propose a
continuous variable quantum identification (CV-QI) protocol based on the
correlation of two-mode squeezed vacuum state and the continuous variable
teleportation. The bidirectional identity verification between two participants
of the communication can be achieved by the proposed CV-QI protocol. In order
to guarantee the security, we make full use of the decoy state sequences during
the whole process of the proposed CV-QI protocol. Besides, we provide the
security analyses of the proposed CV-QI protocol, and analyses indicate that
the security of the proposed CV-QI protocol is guaranteed.
