Quantum deterministic key distribution protocols based on teleportation and entanglement swapping

Abstract

The distribution of the deterministic key has great significance in quantum communication. By exploiting quantum teleportation and entanglement swapping, two quantum deterministic key distribution (QDKD) protocols are presented to hand over the previously deterministic key to the intended receiver, which is different from the existed quantum key distribution (QKD) protocols only yielding a random key. Meanwhile, the proposed QDKD protocol based on teleportation can also distribute the random key. Furthermore, the security of QDKD protocols is analyzed in detail from information theory. It shows that our proposed QDKD protocols can securely and effectively hand over the pre-deterministic key to the specific target. The QDKD protocols are the necessary supplement to the QKD protocols generating random key and of great significance in the field of key management.