METHOD FOR DISTRIBUTING QUANTUM CRYPTOGRAPHIC KEY AND COMMUNICATION SYSTEM,申请号JP20020046187-传众专利搜索

首页产品黄页商标征信

会员服务注册登录

法人/股东/高管

发明名称	METHOD FOR DISTRIBUTING QUANTUM CRYPTOGRAPHIC KEY AND COMMUNICATION SYSTEM
摘要	PROBLEM TO BE SOLVED: To provide a quantum cryptographic key distribution device more efficiently, more inexpensively and unconditionally a secure secret key for common key encryption. SOLUTION: A transmission site is provided with a Mach-Zehnder interference switch provided with a phase modulator constituting an asymmetric Mach- Zehnder interference system, while a reception site is provided with photon detectors for detecting respective transmission line of a long range transmission line and a short range transmission light of the asymmetrical Mach-Zehnder interference system and a recorder for recording the time when each of the photon detectors detects a photon. The secret key is shared on the basis of the fact that a phase modulation value obtained from arrangements with a sender is either (0,π) or (π/2, 3π/2) and recorded results of the recorder. COPYRIGHT: (C)2003,JPO
申请公布号	JP2003249928(A)	申请公布日期	2003.09.05
申请号	JP20020046187	申请日期	2002.02.22
申请人	NEC CORP	发明人	NANBU YOSHIHIRO;KANBE TOSHIYUKI
分类号	H04L9/12;H04L9/08;(IPC1-7):H04L9/12	主分类号	H04L9/12
代理机构		代理人
主权项
地址

您可能感兴趣的专利

Implantable catheter for use in e.g. surgery, has cylindrical unit with openings extending from flat sections with groove-like recess at outer surface of unit to inner area surface, where passages from outer surface to sections are rounded

MULTIPLEXED MICROFLUIDIC VALVE ACTIVATOR

Hypermedia sites providing method, involves producing and including program source code suitable for client sided execution, in information to be transmitted over hypermedia site, and transmitting information over site to client system

Remote controlling system for use with park system of motor vehicle, has vehicle transmitting information to radio remote control after reception of control instructions, if vehicle cannot execute control instruction

Air dehumidifier for dehumidifying a room comprises a fan heater with a cyclic throw-over switch and a control unit triggered by a module for switching on and a module for switching off

Vehicle`s driving condition parameter controlling method, involves determining lateral guided force in accordance with given kinematic relation as function of rack steering force which acts in rack steering of steering system of vehicle

Steering gear for motor vehicle, has discharge opening and valve provided at steering gear housing, where valve is activated through masses, which react with water, and stays in connection with internal space section of gear housing

Internal combustion engine`s fuel consumption determining method, involves determining temperature-conditional volume changes of fuel in fuel circuit, and adjusting consumption amount by correction amount corresponding to changes

Water line brick, has visible surfaces for bordering storage areas, and boring formed in storage areas, where boring has slotted holes that are arranged parallel to each other and brick designed as solid bricks

Foldable product i.e. bottle, package, has side flaps and cover flop forming connected package handle, which lies around product that is stoppable at base side, and connecting flap allowing to removably fix one of side flaps in base side

Use of non-ionic ethoxy compound for the activation of hydrogen peroxide and for the coloring and brightening of keratin fibers

Switching device for use in electronic system, has filters with respective inputs, outputs and connections, and output unit with output that is connected with control connection of one filter and with control input of other filter

Suction- and bubbling system for use in park, has motor-driven suction- and bubbling device operating in condition sustained by user, where system has suction operation device for stationary suction operation of device

Safety device for e.g. motor vehicle, has wheel position driving device controllable during detection of impact, so that wheels are brought into defined wheel position for defined force line path by force transmission device

Surgical instrument for treating e.g. spinal column inflammation, in patient, has retaining arms arranged away from rail, and valves arranged adjacent to each other, where each valve is attached at end of each arm

Component for pressure balancing between inner space of container i.e. oil balancing container, and surroundings of container, has inserting unit arranged such that direct impinging of water steam or vapor steam at unit is prevented

Disk brake for commercial motor vehicle, has brake carrier clamp with projection, which protrudes into lining groove, where projection corresponds with recess at outer edge of brake pads

Motor vehicle`s light alloy wheel leakage test method, involves transmitting detected position of valve body bore in wheel to controller of robot, and automatically inserting sealing element into valve body bore by using robot

Workpiece centering and supporting device for balancing machine, has spring arrangement acting on centering unit, where spring action increases to maximum value during movement of unit and decreases to small value in centering position

Hydraulic push-button switch for detecting pressure in hydraulic arrangement, has carrier adjustable by piston against pretensioning force of spring, and another spring provided in switch, where carrier is loaded with additional force