QUANTUM KEY DISTRIBUTION IN TERMS OF THE GREENBERGER-HORNE-ZEILINGER STATE-MULTI KEY GENERATION

摘要

THE PRESENT INVENTION PROVIDES A METHOD OF CARRYING OUT COMMUNICATION BETWEEN MULTIPLE USERS BASED ON QUANTUM KEY DISTRIBUTION (QKD). THE METHOD COMPRISES GENERATING (101) GREENBERGER-HORNE-ZEILINGER STATES (GHZS) BY ALL USERS RANDOMLY; DISTRIBUTING (102) A PARTICLE FROM EACH GHZS TO FORM SUB-SEQUENCES; FORMING (103) A PLURALITY OF SEQUENCES CORRESPOND TO A PLURALITY OF USERS BASED ON THE PARTICLES ON EACH USER, WHEREIN ONE OF THE SEQUENCES GENERATED BY THE SENDER COMPRISES A HOME SEQUENCE; TRANSMITTING (104) TO THE EACH OTHER USERS A SEPARATE SEQUENCE; CHECKING (105) SECURITY OF THE CHANNELS THROUGH VERIFYING THE SEQUENCES; ENCODING (107) USERS' OWN KEY THAT ARE IN THE PARTICLES OF THE OTHER USERS; TRANSMITTING (108) BLOCKS OF PARTICLES BACK TO THE CORRESPONDING USER; RETRIEVING (109) OWN INITIAL SEQUENCES, WHEREIN THE KEYS OF THE OTHER USERS ARE DECODED; PERFORMING (110) A GHZS MEASUREMENT TO OBTAIN ENCODED KEYS BY EACH USER; AND COMPARING (112) THE MEASUREMENT RESULTS AT EACH USER SITE. FIG. 1