CN112116051A - 一种智能rfid屏蔽芯片 - Google Patents

一种智能rfid屏蔽芯片 Download PDF

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CN112116051A
CN112116051A CN202010992127.1A CN202010992127A CN112116051A CN 112116051 A CN112116051 A CN 112116051A CN 202010992127 A CN202010992127 A CN 202010992127A CN 112116051 A CN112116051 A CN 112116051A
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radio frequency
module
interference
frequency communication
generating circuit
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武鹏
张建伟
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Shanghai Mingsi Microelectronics Co ltd
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Shanghai Mingsi Microelectronics Co ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/073Special arrangements for circuits, e.g. for protecting identification code in memory
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07745Mounting details of integrated circuit chips

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

本发明提出一种智能RFID屏蔽芯片,其特征在于,包含:射频通信RF模块,解调电路,干扰产生电路。本发明的有益效果是,使用本发明所述的智能RFID屏蔽芯片制作的屏蔽电子标签不需要特殊的屏蔽开关,便携性好;且当需要同时屏蔽多张普通电子标签时,只需要将本发明所述的智能RFID屏蔽芯片制作的屏蔽电子标签和所有需要屏蔽的普通电子标签放在一起即可一次性屏蔽多张普通电子标签。

Description

一种智能RFID屏蔽芯片
技术领域
本发明属于集成电路设计领域,具体来说,属于RFID芯片设计领域。
背景技术
RFID(Radio Frequency Identification),即射频识别技术。一套射频识别系统一般由读写器,电子标签和后端数据处理平台三部分组成。
读写器和电子标签是通过对载波调制来进行通信的,一般地说,读写器会先对载波进行调制,使载波产生若干pause来表示需要传输的命令,电子标签对接收到的载波上的pause进行解调,并将响应也调制到载波上,这样读卡器和电子标签就通过载波完成了一次通信。
在RFID的攻击事件中,黑客会先对载波进行监听,然后模拟读卡器的行为发出命令,这样即会获取电子标签的ID信息等关键数据。
目前常用的屏蔽技术主要是物理屏蔽,比如对电子标签设置屏蔽开关,当屏蔽开关打开时,电子标签不响应载波上的任何命令。但这类屏蔽技术的主要缺点在于首先需要对电子标签设置特殊开关,如拨片,按键等,影响电子标签的便携性,其次此类屏蔽技术均是针对单张电子标签,当需要屏蔽的卡片较多时,需要将每张卡片的屏蔽开关打开,费时费力。
发明内容
为了克服现有技术的缺点,本发明提出一种智能RFID屏蔽芯片,当不希望普通电子标签被读取时,将本发明所述的智能RFID屏蔽芯片制作的屏蔽电子标签和需要屏蔽的普通电子标签放在一起,普通电子标签即不会响应任何读卡器的命令,从而避免关键数据被获取。
一种智能RFID屏蔽芯片其特征在于,包含:射频通信RF模块,解调电路,干扰产生电路。
所述射频通信RF模块,其输入连接干扰产生电路,其输出连接解调电路。射频通信RF模块的主要功能是将接收到的载波转换为电平信号送给所述解调电路,并将所述干扰电路产生的输出信号调制到载波上去。
所述解调电路,其输入连接射频通信RF模块,其输出连接干扰产生电路。解调电路的主要功能是对所述射频通信RF模块输出的电平信号进行解调,产生所述干扰产生电路需要的pause信息。
所述干扰产生电路,其输入连接解调电路,其输出连接射频通信RF模块。干扰产生电路的主要功能是收到解调电路解出的pause信息后,产生干扰信号送给所述射频通信RF模块。
如图2所示,干扰信号通过射频通信RF模块调制到载波上,需要屏蔽的普通电子标签就会从载波上得到读卡器发送的pause命令序列叠加干扰信号,从而认为当前载波上的命令序列为非法命令序列,进而不做出响应。由于本发明所述一种智能RFID屏蔽芯片的干扰是加到载波上的,故所有处于读卡器场中的普通电子标签都不会做出响应,从而达到了一次性屏蔽多张普通电子标签的目的。
因为需要屏蔽的电子标签使用的协议有可能不同,故干扰产生电路产生的干扰信号根据需要屏蔽的电子标签的协议可以是不同宽度且任意个pause或pause序列。
使用本发明的有益效果是,使用本发明所述的智能RFID屏蔽芯片制作的屏蔽电子标签和普通电子标签的制作方法一样,不需要特殊的屏蔽开关,便携性好;当需要同时屏蔽多张普通电子标签时,只需要将本发明所述的智能RFID屏蔽芯片制作的屏蔽电子标签和所有需要屏蔽的普通电子标签放在一起即可一次性屏蔽多张普通电子标签。
附图说明
图1为本发明提出的一种智能RFID屏蔽芯片的结构图
图2为读卡器发送的正常命令pause序列叠加干扰信号pause序列示意图
具体实施方式
以下根据附图,具体说明本发明的较佳实施例。
如图1所示,一种智能RFID屏蔽芯片,包含:射频通信RF模块,解调电路,干扰产生电路。
所述射频通信RF模块,其输入连接干扰产生电路,其输出连接解调电路。射频通信RF模块的主要功能是将接收到的载波转换为电平信号送给所述解调电路,并将所述干扰电路产生的输出信号调制到载波上去。
所述解调电路,其输入连接射频通信RF模块,其输出连接干扰产生电路。解调电路的主要功能是对所述射频通信RF模块输出的电平信号进行解调,产生所述干扰产生电路需要的pause信息。
所述干扰产生电路,其输入连接解调电路,其输出连接射频通信RF模块。干扰产生电路的主要功能是收到解调电路解出的pause信息后,产生干扰信号送给所述射频通信RF模块。
如图2所示,干扰信号通过射频通信RF模块调制到载波上,需要屏蔽的普通电子标签就会从载波上得到读卡器发送的pause命令序列叠加干扰信号,从而认为当前载波上的命令序列为非法命令序列,进而不做出响应。
该干扰信号根据需要屏蔽的电子标签的协议可以是不同宽度且任意个pause或pause序列。
尽管本发明的内容已经通过上述优选实施例作了详细介绍,在本领域技术人员阅读了上述内容后,对于本发明的多种修改和替代都将是显而易见的。以上的描述和附图仅仅是实施本发明的范例,但应当认识到上述的描述不应被认为是对本发明的限制。

Claims (3)

1.一种智能RFID屏蔽芯片,其特征在于,包含:射频通信RF模块,解调电路,干扰产生电路;所述射频通信RF模块,其输入连接干扰产生电路,其输出连接解调电路,射频通信RF模块的主要功能是将接收到的载波转换为电平信号送给所述解调电路,并将所述干扰电路产生的输出信号调制到载波上去;所述解调电路,其输入连接射频通信RF模块,其输出连接干扰产生电路,解调电路的主要功能是对所述射频通信RF模块输出的电平信号进行解调,产生所述干扰产生电路需要的pause信息;所述干扰产生电路,其输入连接解调电路,其输出连接射频通信RF模块,干扰产生电路的主要功能是收到解调电路解出的pause信息后,产生干扰信号送给所述射频通信RF模块。
2.如果权利要求1所述一种智能RFID屏蔽芯片,其特征在于所述干扰产生电路产生的干扰信号通过射频通信RF模块调制到载波上。
3.如果权利要求1所述一种智能RFID屏蔽芯片,其特征在于所述干扰产生电路产生的干扰信号根据需要屏蔽的电子标签的协议不同,可以是不同宽度且任意个pause或pause序列。
CN202010992127.1A 2020-09-22 2020-09-22 一种智能rfid屏蔽芯片 Withdrawn CN112116051A (zh)

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