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公开(公告)号：US08909141B2
公开(公告)日：2014-12-09
申请号：US13483241
申请日：2012-05-30
IPC分类号： H04B5/00
CPC分类号： H04B5/0031 , H04B5/0081 , H04K1/02 , H04K3/43 , H04K3/68 , H04K3/825 , H04K2203/34
摘要： Security in inductively coupled communications systems, such as near field communications (NFC), may be improved by restricting signals carrying user data to an authorized data transmission region. Security may be particularly important when the NFC carries financial transaction information or authorization credentials. Scramble signals may be transmitted along with data signals carrying the user data and designed to overshadow the data signals outside of the authorized data transmission region. The scramble signal transceiver may be designed to have a slower decay rate with distance from the transceiver than the data signal. By adjusting the power levels of the scramble signal and the data signal, the authorized data transmission region may be adjusted. Scramble signals may not be required if the data signal strength outside the authorized data transmission region is below the minimum threshold value required by eavesdropping receivers.
摘要翻译： 电感耦合通信系统（例如近场通信（NFC））中的安全性可以通过将承载用户数据的信号限制到授权的数据传输区域来改进。 当NFC携带金融交易信息或授权凭证时，安全性可能尤为重要。 扰频信号可以与携带用户数据的数据信号一起传输，并被设计为遮蔽授权数据传输区域外部的数据信号。 加扰信号收发器可以被设计为具有比数据信号具有比收发器更远的衰减速率。 通过调整加扰信号和数据信号的功率电平，可以调整授权数据传输区域。 如果授权数据传输区域外的数据信号强度低于窃听接收机所需的最小阈值，则可能不需要扰频信号。
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公开(公告)号：US20120322372A1
公开(公告)日：2012-12-20
申请号：US13483241
申请日：2012-05-30
IPC分类号： H04B5/00
CPC分类号： H04B5/0031 , H04B5/0081 , H04K1/02 , H04K3/43 , H04K3/68 , H04K3/825 , H04K2203/34
摘要： Security in inductively coupled communications systems, such as near field communications (NFC), may be improved by restricting signals carrying user data to an authorized data transmission region. Security may be particularly important when the NFC carries financial transaction information or authorization credentials. Scramble signals may be transmitted along with data signals carrying the user data and designed to overshadow the data signals outside of the authorized data transmission region. The scramble signal transceiver may be designed to have a slower decay rate with distance from the transceiver than the data signal. By adjusting the power levels of the scramble signal and the data signal, the authorized data transmission region may be adjusted. Scramble signals may not be required if the data signal strength outside the authorized data transmission region is below the minimum threshold value required by eavesdropping receivers.
摘要翻译： 电感耦合通信系统（例如近场通信（NFC））中的安全性可以通过将承载用户数据的信号限制到授权的数据传输区域来改进。 当NFC携带金融交易信息或授权凭证时，安全性可能尤为重要。 扰频信号可以与携带用户数据的数据信号一起传输，并被设计为遮蔽授权数据传输区域外部的数据信号。 加扰信号收发器可以被设计为具有比数据信号具有比收发器更远的衰减速率。 通过调整加扰信号和数据信号的功率电平，可以调整授权数据传输区域。 如果授权数据传输区域外的数据信号强度低于窃听接收机所需的最小阈值，则可能不需要扰频信号。
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