WO2015154561A1 - 一种声波安全支付方法及系统 - Google Patents

一种声波安全支付方法及系统 Download PDF

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Publication number
WO2015154561A1
WO2015154561A1 PCT/CN2015/070705 CN2015070705W WO2015154561A1 WO 2015154561 A1 WO2015154561 A1 WO 2015154561A1 CN 2015070705 W CN2015070705 W CN 2015070705W WO 2015154561 A1 WO2015154561 A1 WO 2015154561A1
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Prior art keywords
audio
frame
transaction
key
unit
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PCT/CN2015/070705
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English (en)
French (fr)
Inventor
黄继翔
张炽成
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福建联迪商用设备有限公司
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Publication of WO2015154561A1 publication Critical patent/WO2015154561A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/32—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using wireless devices
    • G06Q20/327—Short range or proximity payments by means of M-devices
    • G06Q20/3272—Short range or proximity payments by means of M-devices using an audio code
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/08—Payment architectures
    • G06Q20/20—Point-of-sale [POS] network systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3829—Payment protocols; Details thereof insuring higher security of transaction involving key management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves

Definitions

  • the present invention relates to the field of electronic payment, and in particular, to a sound wave security payment method and system.
  • the existing methods for providing the short-range communication connection include Bluetooth technology, infrared data transmission, and near field communication (NFC).
  • Bluetooth technology needs to be artificially operated to establish a paired device at both ends of the device to operate, the price of the Bluetooth chip is higher, the business volume is larger, or need to pay quickly
  • the hardware modification cost of the equipment at both ends is high; since the infrared data transmission is a kind of line-of-sight transmission, the two mutually communicating devices must be aligned and the middle cannot be blocked by the object to be successfully connected, so Poor reliability and anti-interference ability, low data transmission rate, most mobile terminals are not equipped with infrared connection function; near-field communication NFC technology uses two-way identification and connection, the distance in the range of 10cm-20c
  • the payment technology of the short-distance communication connection in the prior art generally fails to meet the requirements of fast and easy to use and low-cost and easy to popularize for offline payment, so it is necessary to provide a quick, convenient and easy to use.
  • a low-cost and payment process that guarantees reliability, security, and efficiency of short-range secure payment methods and systems to meet the requirements of convenient, safe, reliable, and efficient electronic payment.
  • the object of the present invention is to provide a short-range acoustic wave secure payment method capable of satisfying the requirements of convenient, safe, reliable and efficient electronic payment, realizing quick, convenient, simple, easy to use, low-cost and payment process to ensure reliability, safety and high efficiency. Its system.
  • Providing a method for secure payment of sound waves includes the following steps:
  • the payment terminal establishes an order and acquires transaction information corresponding to the transaction data of the order from the network end database, encrypts the transaction information using the key, performs RS coding to generate a data frame, and then performs phase shift keying modulation on the data frame. Generate an audio frame and play the corresponding audio;
  • the receiving end After receiving the audio, the receiving end performs phase shift keying demodulation to generate a data frame, performs RS decoding on the data frame, decrypts the pre-stored key to generate transaction information, and then uses the transaction information from the network side.
  • the database acquires corresponding transaction data and displays it, and then sends a confirmation transaction instruction corresponding to the transaction data to the network side database;
  • the network side database After receiving the confirmation transaction instruction, the network side database performs a payment operation on the corresponding transaction data.
  • a sound wave secure payment system comprising a payment terminal, a payment terminal and a network end database, the payment terminal comprising a first audio transmitting unit and a first audio receiving unit, the receiving end comprising a second audio transmitting unit and a a second audio receiving unit, wherein the payment terminal includes;
  • An order establishing unit for establishing an order and obtaining transaction information corresponding to the transaction data of the order from the network side database
  • a first transaction unit for encrypting transaction information using a key and performing RS encoding to generate data Frame, then performing phase shift keying modulation on the data frame to generate an audio frame and playing the corresponding audio through the first audio transmitting unit;
  • the payment end includes:
  • a second transaction unit configured to acquire the data frame by phase shift keying demodulation after acquiring the audio by the second audio receiving unit, perform RS decoding on the data frame, and decode the data with a pre-stored key to generate transaction information, and ;
  • a transaction confirmation unit configured to use the transaction information to obtain corresponding transaction data from a network end database and display the same, and then send a confirmation transaction instruction with the transaction data to the network end database;
  • the network side database is configured to perform a payment operation on the corresponding transaction data after receiving the confirmation transaction instruction.
  • the invention has the beneficial effects that the RS-coded and phase-shifted keying is modulated into the key audio by encrypting the key randomly generated by the payment terminal through the process of the sound wave connection by establishing the acoustic wave connection between the payment end and the payment end.
  • the frame is transmitted to the receiving end.
  • the payment terminal After the sonic connection is successfully established, the payment terminal establishes an order and acquires the transaction information of the order, and the transaction information is encrypted by using the key, and then RS coding and phase shift keying modulation method are used to divide each two bits of the data frame.
  • a symbol is mapped to an I signal and a Q signal through a constellation diagram, and the two signals are represented by two carrier phases having a phase difference of 90 degrees; and the modulated I channel signal and the Q channel signal are added together.
  • Audio is played after the audio frame; after receiving the audio, the payee obtains the data frame by orthogonal coherent demodulation processing, and obtains the transaction information after decrypting by RS decoding and pre-stored key, and then using the transaction information from the network side.
  • the database acquires the corresponding transaction data and displays it, and simultaneously sends the confirmation transaction instruction corresponding to the transaction data to the network database to complete the payment for the corresponding transaction data.
  • the order transaction information of the payment terminal is encrypted, converted into an audio frame by RS coding and phase shift keying modulation, and then transmitted to the receiving end through the sound wave, and the receiving end uses the pre-stored key to decrypt and RS.
  • the decoding and quadrature coherent demodulation processing is converted into transaction information to complete the payment process, and the transmission data is encrypted by the encryption of the sound wave transmission data to ensure that the transmission data is not stolen; and the RS codec method with error correction function can be effectively used for transmitting the data.
  • the receiving end decodes the demodulation error or the missing code; through the two-way transmission between the payment terminal and the payment terminal, and the feedback response that conveys the correctness of the order information, It can ensure the correctness of information transmission between the payment end and the payment end, and avoid the phenomenon that the transmission data is wrong and still pay during the transmission process, and the reliability is high.
  • FIG. 1 is a system block diagram of an acoustic wave secure payment method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of execution of a method for sound wave payment payment according to an embodiment of the present invention
  • FIG. 3 is a flow chart showing an execution of sound wave payment in an example
  • Figure 5 is a schematic structural diagram of a control frame
  • FIG. 6 is a flow chart of execution of a handshake connection between a payment end and a payment end to establish an acoustic connection
  • Fig. 7 is a flow chart showing the execution of sound wave transmission of transaction information.
  • the present invention provides an acoustic wave secure payment method and system, in which the payment encryption key K is randomly generated, and the process of transmitting the encryption key is used as a step of verifying the success of the sound wave connection.
  • the successful or failed control frame informs the sender to receive the result and obtain the feedback response of the data transmission, thereby pushing the sender to the next stage or retransmitting the data, improving the transmission reliability; in addition, the present invention is in the high frequency band (16-18 kHz).
  • Sending the acoustic wave signal and adopting the phase shift keying modulation method can effectively improve the anti-interference performance and stability performance, avoid the decoding terminal demodulation error or missing code, and can ensure the information transmission between the payment end and the payment end. Correctness and reliability.
  • FIG. 1 is a system block diagram of an acoustic wave payment system according to an embodiment of the present invention.
  • the sonic payment system 100 includes a payment terminal 10, a network side database 20, and a payment terminal 30.
  • the payment terminal 10 is installed on the cash register terminal or the financial POS of the merchant equipped with the audio function
  • the payment terminal 30 is installed on the mobile terminal (such as a mobile phone or a tablet computer) with the audio function of the customer
  • the network side database 20 is located to provide payment. Service in the payment service provider system.
  • the payment terminal 30 includes a first audio transmitting unit and a first audio receiving unit, and the payment terminal further includes an order establishing unit for establishing an order and acquiring transaction data with the order from the network side database.
  • Corresponding transaction information and a first transaction unit, configured to encrypt the transaction information using a key and perform RS coding to generate a data frame, and then perform phase shift keying modulation on the data frame to generate an audio frame and send the first audio through the first audio
  • the unit plays the corresponding audio;
  • the payment terminal 10 includes a second audio sending unit, a second audio receiving unit, a second transaction unit, and a transaction confirmation unit, and the second transaction unit is configured to acquire the audio by using the second audio receiving unit.
  • Shift keying demodulation generates a data frame, performs RS decoding on the data frame, and decodes the pre-stored key to generate transaction information, and;
  • a transaction confirmation unit configured to use the transaction information to obtain corresponding transaction data from a network end database and display the same, and then send a confirmation transaction instruction with the transaction data to the network end database;
  • the network side database is configured to perform a payment operation on the corresponding transaction data after receiving the confirmation transaction instruction.
  • the payment terminal 10 further includes a first feedback unit, and the payment terminal further includes a first feedback response unit: the first feedback unit is configured to: after the second transaction unit decrypts successfully, pass the first The second audio transmitting unit plays the successfully controlled audio corresponding to the successful control frame of the phase shift keying modulation; after the decryption fails, the second audio transmitting unit plays the failed control audio corresponding to the failed control frame of the phase shift keying modulation;
  • the first feedback response unit is configured to perform phase shift keying demodulation to generate a success control frame or a failure control frame after the first audio receiving unit acquires the successful control audio or the failure control audio, and generate a failure control frame.
  • the first transaction unit is notified to perform the "play corresponding audio by the first audio transmitting unit" operation when the frame is controlled.
  • the first transaction unit includes a first connection unit and a connection confirmation unit, where the first connection unit is configured to randomly generate a DES key and RS-encode it to form a key data frame, and then compact The key data frame is phase-shifted and keyed and modulated into a key audio frame and broadcasted through the first audio transmission unit Put the corresponding key audio;
  • the second transaction unit includes a second connection unit, configured to perform phase shift keying demodulation on the second audio receiving unit after acquiring the key audio, and then perform RS decoding and determine whether the demodulation is successful. If successful, storing the DES key and playing the successfully controlled audio corresponding to the successful control frame of the phase shift keying modulation, and if not, notifying the second audio sending unit to play the failure corresponding to the failed control frame of the phase shift keying modulation Control audio
  • the first audio receiving unit is configured to obtain a successful control audio or a failure control audio by the payment terminal to perform phase shift keying demodulation to obtain a successful control frame or a failure control frame, and pass the first transaction unit when generating a successful control frame. Performing phase shift keying modulation on the data frame to generate an audio frame and playing the corresponding audio; and returning to the first connection unit to play the corresponding key audio through the first audio transmitting unit when the failure control frame is generated.
  • the data frame or the key data frame includes data, a start flag, and an end flag;
  • the success control frame includes a start flag, an end flag, and a correct flag;
  • the failure control frame includes a start flag, End flag and error flag.
  • the “phase shift keying modulation on the data frame” is specifically: dividing each two bits of the data frame, the key data frame, the success control frame, or the failure control frame into one symbol and mapping to a symbol through the constellation.
  • the road signal and the Q channel signal, and the two signals are represented by two carrier phases with a phase difference of 90 degrees; and the modulated I channel signal and the Q channel signal are added to obtain an audio frame, a key audio frame, and a successful control. Audio frame or failure control audio frame signal.
  • FIG. 2 is a flowchart of execution of an acoustic wave secure payment method according to an embodiment of the present invention.
  • the sound wave secure payment method is applied to the sound wave secure payment system, and the method comprises the following steps:
  • the payment terminal establishes an order and acquires transaction information corresponding to the transaction data of the order from the network end database, encrypts the transaction information using the key, performs RS coding to generate a data frame, and then performs phase shift keying modulation on the data frame. Generate an audio frame and play the corresponding audio;
  • the receiving end After receiving the audio, the receiving end performs phase shift keying demodulation to generate a data frame, performs RS decoding on the data frame, decrypts the pre-stored key to generate transaction information, and then uses the transaction information from the network side.
  • the database acquires corresponding transaction data and displays it, and then sends a confirmation transaction instruction corresponding to the transaction data to the network side database;
  • the network side database After receiving the confirmation transaction instruction, the network side database performs payment on the corresponding transaction data. operating.
  • the step S2 after performing RS decoding on the data frame, further includes:
  • the receiving end plays the successful control audio corresponding to the successful control frame of the phase shift keying modulation; when the decoding fails, the receiving end plays the failure control audio corresponding to the failed control frame of the phase shift keying modulation;
  • the payment terminal After the payment terminal obtains the successful control audio or the failure control audio, it performs phase shift keying demodulation to generate a success control frame or a failure control frame, and returns to perform the "play corresponding" in step S1 when the failure control frame is generated. Audio step.
  • the “then phase shift keying modulation of the data frame to generate an audio frame and play the corresponding audio” further includes a sound wave connection establishing step, specifically:
  • the payment end randomly generates a DES key and RS-encodes it to form a key data frame, and then performs phase shift keying modulation on the key data frame into a key audio frame and plays the corresponding key audio;
  • the receiving end After receiving the key audio, the receiving end performs phase shift keying demodulation, and performs RS decoding to determine whether the decoding is successful; if successful, the receiving end stores the DES key and plays the phase shift keying modulation. The successful control audio corresponding to the success control frame, if it fails, the receiving end plays the failure control audio corresponding to the failure control frame of the phase shift keying modulation;
  • the payment terminal performs phase shift keying demodulation on the obtained successful control audio or failure control audio to obtain a successful control frame or a failure control frame, and enters the phase shift keying of the data frame when generating a successful control frame.
  • the data frame or key data frame includes data, a start flag, and an end flag; the success control frame includes a start flag, an end flag, and a correct flag; the failure control frame includes a start flag, an end flag, and an error flag.
  • the specific implementation step of performing “phase shift keying modulation” includes: dividing each two bits of the data frame, the key data frame, the success control frame, or the failure control frame into one symbol and mapping it to the I through the constellation diagram.
  • the road signal and the Q channel signal, and the two signals are represented by two carrier phases with a phase difference of 90 degrees; and the modulated I channel signal and the Q channel signal are added to obtain an audio frame, a key audio frame, and a successful control. Audio frame or failure control audio frame signal;
  • phase shift keying demodulation includes: using orthogonal coherent demodulation to adjust the sound The frequency, key audio successfully controls the audio or fails to control the audio back into an audio frame, a key audio frame, or a control audio frame.
  • FIG. 3 is an execution flowchart of implementing sound wave payment in an example. The process is specifically as follows:
  • the payment terminal unit establishes a transaction order and obtains the transaction identifier and the required information from the network side database unit through the Internet;
  • the payment terminal unit encrypts the transaction identifier and information
  • the payment end unit and the payment end unit handshake to establish an acoustic connection
  • the payment end unit is phase-shifted and keyed and modulated, and the receiving end unit successfully obtains the correct sound wave audio
  • the receiving end unit RS decodes and decrypts the key to identify the transaction identifier and information
  • the payment end unit obtains the order information from the network side database unit and confirms the transaction through the Internet by using the obtained transaction identifier and information;
  • the payment end unit and the payment end unit both obtain an indication of completion of the transaction from the network side database unit via the Internet.
  • the phase shift keying PSK modulation method is a modulation technique for representing input signal information by carrier phase, and each bit of the data frame, key data frame, success control frame or failure control frame encoded by the RS algorithm is used. Divided into one symbol, the symbol is mapped to the I signal and the Q signal by the constellation map to perform high frequency modulation respectively.
  • the modulated carrier used for the I signal is cos ⁇ t, and the Q channel is the phase difference 90.
  • the audio signal received by the receiving end may temporarily change in the signal intensity due to the short-term change of the angle and position of the handheld device, that is, the response is received.
  • the amplitude modulation technology such as QAM, ASK, etc.
  • the information relies on the phase modulation technique PSK of the carrier phase, which is better in anti-interference performance and stability.
  • the length of the control flag is 1 byte, the start flag is byte 0x0F, the end flag is byte 0xF0, the correct flag is 0x34, and the error flag is 0xAB.
  • Audio data frame and control frame format
  • FIG. 4 is a schematic structural diagram of a data frame.
  • the 4-byte check byte in the data frame is obtained by the RS (15, 11) algorithm (Reed-Solomon error correction code), that is, 4 check bytes can be generated for every 11 bytes of valid data, which can be corrected 2
  • the byte transmission error, the data frame valid data is less than 11 bytes of padding 0.
  • FIG. 5 is a schematic structural diagram of a control frame, which is three bytes in length.
  • FIG. 6 is a flow chart showing the execution of the sonic connection between the payment end and the payment end
  • FIG. 7 is a flow chart of the execution of the sound wave transmission of the transaction information.
  • the payment terminal establishes an order according to the price of the commodity information
  • the payment terminal order information is transmitted to the network side database unit through the Internet to request to generate a transaction;
  • the network receives the order information and generates transaction information
  • the network sends the transaction indication and related information to the payment segment
  • the payment terminal receives the transaction indication and related information via the Internet;
  • the payment terminal randomly generates a 56-bit length DES encryption key K;
  • the payment end encrypts the transaction indication and related information obtained in step 7) by using the key K, and uses DES encryption;
  • the payment terminal performs PSK modulation on the data frame into an audio signal
  • step e at the receiving end, if the RS decoding is successful, the PSK modulation sends a successful control frame, proceeds to step g); if the failure proceeds to step f);
  • step h) the receiving terminal sends a failed control frame, and proceeds to step h);
  • the payment terminal receives the success control frame, and the sound wave connection is established;
  • the payment terminal receives the failure control frame and returns to step c);
  • the payment terminal stores the secret key K;
  • the payment end performs RS coding on the encrypted data in step 9) to form a data frame;
  • the payment terminal performs PSK modulation on the data frame into an audio signal
  • step e the receiving end sends a successful control frame if PSK modulation, RS decoding is successful, proceeds to step g); if it fails, proceeds to step f);
  • step h) the receiving terminal sends a failed control frame, and proceeds to step h);
  • the payment terminal receives the success control frame, and the sound wave transmission is completed;
  • the payment terminal receives the failure control frame and returns to step c);
  • the payment end uses the key K to decrypt the DES to identify the transaction identifier and information;
  • the payment end unit sends the acquired transaction identifier and information to the network side database unit via the Internet;
  • the network responds to the transaction information order to the receiving end via the Internet
  • the receiving end sends a confirmation transaction command to the network via the Internet;
  • the network sends a successful transaction message to the payment terminal and the payment terminal via the Internet;
  • the invention adopts DES encryption, and the encryption key K is randomly generated, which provides effective security and is not easily broken.
  • the sound wave transmission process of the present invention is composed of a connection establishment process and a data transmission process, and is a two-way communication process, and has a controllable retransmission function, thereby improving transmission reliability, that is, after receiving the data verification, The success or failure of the control audio frame will inform the sender to receive the result, thereby pushing the sender to the next stage or resending the data, improving the transmission reliability.
  • the receiving end can correct 2 error bytes out of 11 valid bytes, further improving the transmission reliability.
  • the present invention transmits an acoustic wave signal in a high frequency band (16-18 kHz) and adopts a phase shift keying modulation mode.
  • a modulation technique in which a carrier phase represents input signal information information depends on a carrier phase phase modulation technique PSK, Effectively resists the sound frequency interference of the natural environment, reflecting the anti-interference.
  • the invention adopts DES encryption, and the key is randomly generated, which provides effective security and is not easily broken.
  • the invention can effectively meet the security, reliability and anti-interference characteristics required for sound wave payment, and can be widely used in various offline electronic payment.

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Abstract

本发明公开一种声波安全支付方法及系统，该方法包括：付款端建立订单并从网络端数据库获取与订单的交易数据相应的交易信息，对交易信息使用密钥进行加密并进行RS编码生成数据帧，然后对所述数据帧进行相移键控调制生成音频帧并播放相应音频；收款端获取所述音频后对其进行相移键控解调生成数据帧，对数据帧进行RS解码后用预存的密钥进行解密生成交易信息，然后使用所述交易信息从网络端数据库获取相应的交易数据并进行显示，之后发送与所述交易数据相应的确认交易指令至网络端数据库；当接收到确认交易指令后，网络端数据库对相应的交易数据进行付款操作。本发明提供一种方便、安全的支付方法及其系统。

Description

一种声波安全支付方法及系统 技术领域
本发明涉及电子支付领域，尤其涉及一种声波安全支付方法及系统。
背景技术
由于近年来电子商务模式的高速发展，一种Online线上网店Offline线下消费的模式越来越受欢迎，商户可以通过互联网将商家信息、商品信息、优惠卷和支付券等信息推送给消费者，消费者通过线上随性的筛选商品，线下的实物比较、体验后进行有选择地消费，在线下进行支付完成购物。
如今线下支付的形式多种多样，随着互联网技术的推广和移动通信技术的发展，消费者普遍拥有的移动终端如手机、平板电脑能等功能越来越强大，移动支付的形式悄然兴起，消费者可以通过随身的移动终端设备便能进行相应的结算和支付，这种电子支付方式免去了消费者携带大量现金货币的麻烦和风险，有效地提高支付结算的效率，受到越来越多商户的和消费者欢迎。
由于线下的移动支付需要运用到近距离通信技术建立收银端与付款端之间信息传递的桥梁，而现有的提供近距离通信连接的方式有蓝牙技术、红外线数据传输、近场通讯(NFC)技术和二维码扫描等，这些技术还是存在各方面的缺陷，如蓝牙技术需要人为操作建立两端设备配对连接后才能操作、蓝牙芯片价格较高、业务量较大的商户或需要快捷支付的场合时费时又不便，两端设备的硬件改造成本高；红外线数据传输由于是一种视距传输，两个互相通信的设备之间必须对准且中间不能被物体阻隔才能连接成功，故其可靠性和抗干扰能力差，数据传输率低，多数移动终端也并未配置红外线连接功能；近场通讯NFC技术则采用双向识别和连接，在10cm-20cm左右的距离在13.56MHZ高频范围内工作，是目前为止较为安全的近距通讯技术，但是其NFC芯片造价昂贵，目前只有有限的移动终端支持该技术；二维码扫描技术实现支付有较好的容错率和辨识率，但是对于支付和收银终端的拍照摄像镜头有一定要求，对二维码的显示也有要求，且操作过程用时较长，需要人工进行扫描二维码，不便快捷支 付。
综合现有技术中的近距离通讯连接进行支付技术，普遍都不能完美的满足线下支付所需的快捷易用又低成本易普及的需求，因此有必要提供一种能快捷方便、简单易用、低成本且支付过程保证其可靠性、安全性和高效性的近距离安全支付方法和系统以满足电子支付对便捷安全可靠高效的要求。
发明内容
本发明的目的在于提供一种能满足电子支付对便捷安全可靠高效要求，实现快捷方便、简单易用、低成本且支付过程保证其可靠性、安全性和高效性的近距离声波安全支付方法及其系统。
为解决上述技术问题，本发明采用的一个技术方案是：
提供一种声波安全支付方法，包括如下步骤：
S1、付款端建立订单并从网络端数据库获取与订单的交易数据相应的交易信息，对交易信息使用密钥进行加密并进行RS编码生成数据帧，然后对所述数据帧进行相移键控调制生成音频帧并播放相应音频；
S2、收款端获取所述音频后对其进行相移键控解调生成数据帧，对数据帧进行RS解码后用预存的密钥进行解密生成交易信息，然后使用所述交易信息从网络端数据库获取相应的交易数据并进行显示，之后发送与所述交易数据相应的确认交易指令至网络端数据库；
S3、当接收到确认交易指令后，网络端数据库对相应的交易数据进行付款操作。
本发明采用的另一个技术方案是：
提供一种声波安全支付系统，包括付款端、收款端和网络端数据库，所述付款端包括第一音频发送单元和第一音频接收单元，所述收款端包括第二音频发送单元和第二音频接收单元，其特征在于，所述付款端包括；
订单建立单元，用于建立订单并从网络端数据库获取与订单的交易数据相应的交易信息；以及
第一交易单元，用于对交易信息使用密钥进行加密并进行RS编码生成数据 帧，然后对所述数据帧进行相移键控调制生成音频帧并通过第一音频发送单元播放相应音频；
所述收款端包括：
第二交易单元，用于通过第二音频接收单元获取所述音频后对其进行相移键控解调生成数据帧，对数据帧进行RS解码后用预存的密钥进行解码生成交易信息，以及；
交易确认单元，用于使用所述交易信息从网络端数据库获取相应的交易数据并进行显示，之后发送与所述交易数据的确认交易指令至所述网络端数据库；
所述网络端数据库用于当接收到确认交易指令后，网络端数据库对相应的交易数据进行付款操作。
本发明的有益效果在于，通过利用在付款端和收款端之间建立声波连接，通过声波连接的过程将付款端随机生成的密钥加密后进行RS编码和相移键控调制成密钥音频帧传递至收款端，成功建立声波连接后付款端建立订单并获取订单的交易信息，将交易信息使用密钥加密后进行RS编码和相移键控调制方法将数据帧的每两个bit分为一个码元经过星座图映射为I路信号和Q路信号，并将两路信号用相位差为90度的两路载波相位表示；以及将调制后的I路信号和Q路信号相加得到音频帧后播放音频；收款方获取音频后对其进行正交相干解调处理后得到数据帧，经过RS解码和预存的密钥进行解密后得到交易信息，然后使用所述交易信息从网络端数据库获取相应的交易数据并显示，同时发送所述交易数据对应的确认交易指令至网络数据库对相应的交易数据完成付款。通过本发明，实现了将付款端的订单交易信息加密后经过RS编码和相移键控调制后转变为音频帧再通过声波传输至收款端，收款端接收后利用预存的密钥解密并RS解码和正交相干解调处理转变为交易信息来完成支付过程，通过对声波传输数据的加密，保证传输数据不被窃取更改；通过对传输数据使用具有纠错功能的RS编解码方法，可以有效的纠正一定字节的传输错误，尽可能的避免传输数据的错误；通过将编码后的数据帧使用传输效率高的相移键控方式调制解调，有效的提升抗干扰性能和稳定性能，避免收款端解码解调错误或漏码；通过将通过付款端和收款端之间的双向传递，以及传递订单信息正确性的反馈响应， 能保证付款端与收款端之间信息传递的正确性，避免出现在传输过程中传输数据出错仍付款的现象，可靠性高。
附图说明
图1是本发明一实施方式中一种声波安全支付方法的系统框图；
图2是本发明一实施方式中一种声波安全支付方法的执行流程图；
图3是一实例中实现声波支付的执行流程图；
图4是数据帧的结构示意图；
图5控制帧的结构示意图；
图6是付款端与收款端握手建立声波连接的执行流程图；
图7是交易信息的声波传输执行流程图。
主要元件符号说明
声波支付系统      100
收款端             10
网络端数据库       20
付款端             30
具体实施方式
为详细说明本发明的技术内容、构造特征、所实现目的及效果，以下结合实施方式并配合附图详予说明。
为解决背景技术中现有技术存在的缺陷，本发明提供一种声波安全支付方法及系统，支付端加密密钥K随机生成，同时将发送加密秘钥的过程作为验证是否声波连接成功步骤，通过成功或者失败的控制帧告知发送端接收结果，得到数据传递的反馈响应，从而推动发送端进入下一阶段或者重发数据，提高了传输可靠性；另外，本发明在高频段(16-18kHz)发送声波信号，且采用相移键控的调制方式，可以有效的提升抗干扰性能和稳定性能，避免收款端解码解调错误或漏码且能保证付款端与收款端之间信息传递的正确性，可靠性高。
请参阅图1，是本发明一实施方式中一种声波支付系统的系统框图。该声波支付系统100包括收款端10、网络端数据库20和付款端30。
具体地，收款端10安装于商户的搭载音频功能的收银终端或金融POS上，付款端30安装于顾客具有音频功能的移动终端(如手机或平板电脑)上，网络端数据库20位于提供支付服务的支付服务商系统中。
在本实施方式中，所述付款端30包括第一音频发送单元和第一音频接收单元，所述付款端还包括；订单建立单元，用于建立订单并从网络端数据库获取与订单的交易数据相应的交易信息；以及第一交易单元，用于对交易信息使用密钥进行加密并进行RS编码生成数据帧，然后对所述数据帧进行相移键控调制生成音频帧并通过第一音频发送单元播放相应音频；
所述收款端10包括第二音频发送单元、第二音频接收单元、第二交易单元和交易确认单元，第二交易单元，用于通过第二音频接收单元获取所述音频后对其进行相移键控解调生成数据帧，对数据帧进行RS解码后用预存的密钥进行解码生成交易信息，以及；
交易确认单元，用于使用所述交易信息从网络端数据库获取相应的交易数据并进行显示，之后发送与所述交易数据的确认交易指令至所述网络端数据库；
所述网络端数据库用于当接收到确认交易指令后，网络端数据库对相应的交易数据进行付款操作。
在本实施方式中，所述收款端10还包括第一反馈单元，所述付款端还包括第一反馈响应单元：第一反馈单元用于当所述第二交易单元解密成功后，通过第二音频发送单元播放经过相移键控调制的成功控制帧对应的成功控制音频；当解密失败后，通过第二音频发送单元播放经过相移键控调制的失败控制帧对应的失败控制音频；
第一反馈响应单元用于当所述第一音频接收单元获取到所述成功控制音频或失败控制音频后，对其进行相移键控解调生成成功控制帧或失败控制帧，并当生成失败控制帧时通知所述第一交易单元执行所述“通过第一音频发送单元播放相应音频”操作。
在本实施方式中，所述第一交易单元包含第一连接单元和连接确认单元，所述第一连接单元用于随机生成DES密钥并对其进行RS编码形成密钥数据帧，然后将密钥数据帧进行相移键控调制成密钥音频帧并通过第一音频发送单元播 放相应密钥音频；
所述第二交易单元包含第二连接单元，用于当所述第二音频接收单元获取所述密钥音频后对其进行相移键控解调，然后进行RS解码并判断解调是否成功，若成功则存储DES密钥并播放经过相移键控调制的成功控制帧对应的成功控制音频，若失败则通知所述第二音频发送单元播放经过相移键控调制的失败控制帧对应的失败控制音频；
所述第一音频接收单元，用于付款端获取成功控制音频或失败控制音频进行相移键控解调得到成功控制帧或失败控制帧，并当生成成功控制帧时通过所述第一交易单元对所述数据帧进行相移键控调制生成音频帧并播放相应音频；以及当生成失败控制帧时返回至所述第一连接单元通过所述第一音频发送单元播放相应密钥音频。
在本实施方式中，所述数据帧或密钥数据帧中包含数据、开始标志和结束标志；所述成功控制帧包含开始标志、结束标志，和正确标志；所述失败控制帧包括开始标志、结束标志和错误标志。所述“对所述数据帧进行相移键控调制”具体为：将数据帧、密钥数据帧、成功控制帧或失败控制帧的每两个bit分为一个码元经过星座图映射为I路信号和Q路信号，并将两路信号用相位差为90度的两路载波相位表示；以及将调制后的I路信号和Q路信号相加得到音频帧、密钥音频帧、成功控制音频帧或失败控制音频帧信号。
请参阅图2，是本发明一实施方式中一种声波安全支付方法的执行流程图。该声波安全支付方法应用于所述声波安全支付系统中，该方法包括如下步骤：
S1、付款端建立订单并从网络端数据库获取与订单的交易数据相应的交易信息，对交易信息使用密钥进行加密并进行RS编码生成数据帧，然后对所述数据帧进行相移键控调制生成音频帧并播放相应音频；
S2、收款端获取所述音频后对其进行相移键控解调生成数据帧，对数据帧进行RS解码后用预存的密钥进行解密生成交易信息，然后使用所述交易信息从网络端数据库获取相应的交易数据并进行显示，之后发送与所述交易数据相应的确认交易指令至网络端数据库；
S3、当接收到确认交易指令后，网络端数据库对相应的交易数据进行付款 操作。
其中，所述步骤S2中“对数据帧进行RS解码后”后还包括：
当解码成功后，收款端播放经过相移键控调制的成功控制帧对应的成功控制音频；当解码失败后，收款端播放经过相移键控调制的失败控制帧对应的失败控制音频；
所述付款端获取到所述成功控制音频或失败控制音频后对其进行相移键控解调生成成功控制帧或失败控制帧，并当生成失败控制帧时返回执行步骤S1中的“播放相应音频”步骤。
其中，所述“然后对所述数据帧进行相移键控调制生成音频帧并播放相应音频”前还包括声波连接建立步骤，具体为：
S11、付款端随机生成DES密钥并对其进行RS编码形成密钥数据帧，然后将密钥数据帧进行相移键控调制成密钥音频帧并播放相应密钥音频；
S12、收款端获取所述密钥音频后对其进行相移键控解调，并进行RS解码且判断解码是否成功；若成功则收款端存储DES密钥并播放经过相移键控调制的成功控制帧对应的成功控制音频，若失败则收款端播放经过相移键控调制的失败控制帧对应的失败控制音频；
付款端对获取到的成功控制音频或失败控制音频进行相移键控解调得到成功控制帧或失败控制帧，并当生成成功控制帧时进入所述“对所述数据帧进行相移键控调制生成音频帧并播放相应音频”步骤；以及当生成失败控制帧时返回步骤S11中的“播放相应密钥音频”步骤。
其中，所述数据帧或密钥数据帧中包含数据、开始标志和结束标志；所述成功控制帧包含开始标志、结束标志和正确标志；所述失败控制帧包括开始标志、结束标志和错误标志。所述“进行相移键控调制”的具体实现步骤包括：将所述数据帧、密钥数据帧、成功控制帧或失败控制帧的每两个bit分为一个码元经过星座图映射为I路信号和Q路信号，并将两路信号用相位差为90度的两路载波相位表示；以及将调制后的I路信号和Q路信号相加得到音频帧、密钥音频帧、成功控制音频帧或失败控制音频帧信号；
所述“进行相移键控解调”的具体实现步骤包括：采用正交相干解调将音 频、密钥音频成功控制音频或失败控制音频恢复成音频帧、密钥音频帧或控制音频帧。
下面结合一具体实施例对本发明的一种声波安全支付方法及系统的实现进行具体详尽的说明：
请参阅图3，是一实例中实现声波支付的执行流程图。该流程具体为：
第一步，付款端单元建立交易订单，并通过互联网从网络端数据库单元获得交易标识和所需信息；
第二步，付款端单元加密交易标识和信息；
第三步，付款端单元和收款端单元握手建立声波连接；
第四步，付款端单元相移键控调制后通过声波播放，收款端单元成功获取正确的声波音频；
第五步，收款端单元RS解码并密钥解密识别出交易标识和信息；
第六步，收款端单元利用获取的交易标识和信息通过互联网从网络端数据库单元获得订单信息并确认交易；
第七步，付款端单元和收款端单元均通过互联网从网络端数据库单元获得交易完成的指示。
相移键控PSK调制方法：
相移键控PSK调制方法是一种用载波相位表示输入信号信息的调制技术，将经过RS算法编码过的所述数据帧、密钥数据帧、成功控制帧或失败控制帧的每两位bit分为一个码元，经该码元经过星座图映射为I路信号和Q路信号两路信号分别进行高频调制，I路信号所用的调制载波为cosωt，Q路用的则是相位差90度的载波sinωt，其中，ω＝2πf0，f0为16kHz～18kHz内所选的一个高频频点，以未调载波的相位作为基准的相位，不同的符号对应不同的相位叠加到各自载波中形成以调信号。设调制形成的不同符号的数量为M，则标记为MPSK(M为2的n次幂，n＞＝2)，这每个符号所含信息量为log2M bit，因此，只需根据实际应用的需求，在调制时增加或者减小M的取值，便可实现提高或者降低传输速率的目的，且选取的都在高频段，因此频率抗干扰性能较好，有利于解码端正确解码。
由于进行声波支付的一端采用移动终端手持设备，在声波通信过程中，会由于手持设备角度、位置等短暂变化，导致接收端收到的音频信号在信号强度上产生短暂波动变化，即反应在收到的已调信号幅值上。所以对于信息依赖于已经已调信号幅度的幅度调制技术(如QAM、ASK等)，会产生一定的误码可能。相反，信息依赖于载波相位的相位调制技术PSK，抗干扰性能和稳定性更佳。
控制标志：
控制标志的长度为1字节，起始标志为字节0x0F，结束标志为字节0xF0，正确标志为0x34，错误标志为0xAB。
音频数据帧和控制帧格式：
请参阅图4，是数据帧的结构示意图。数据帧中的4字节校验字节通过RS(15，11)算法(里德-所罗门纠错码)得出，即每11字节有效数据可生成4个校验字节，可以纠正2字节的传输错误，数据帧有效数据不足11字节的填充0。请参阅图5，是控制帧的结构示意图，为三个字节长度。
声波连接以及交易信息声波传输的详细工作流程：
请一并参阅图6、图7，图6是付款端与收款端握手建立声波连接的执行流程图，图7是交易信息的声波传输执行流程图。
1)付款端付款流程启动；
2)收款端收款流程启动；
3)付款端根据商品信息价格等建立订单；
4)付款端订单信息通过因特网传送到网络端数据库单元请求生成交易；
5)网络端收到订单信息，生成交易信息；
6)网络端发送交易标示和相关信息给付款段；
7)付款端通过因特网收到交易标示和相关信息；
8)付款端随机生成56bit长度的DES加密密钥K；
9)付款端利用密钥K加密步骤7)获得的交易标示和相关信息，采用DES加密；
10)开始声波连接过程(如图6)
a)付款端对密钥K进行RS编码形成数据帧；
b)付款端将数据帧进行PSK调制成音频信号；
c)付款端发送音频信号；
d)收款端接收音频信号；
e)收款端如果RS解码成功，PSK调制发送成功的控制帧，进入步骤g)；如果失败进入步骤f)；
f)收款端发送失败的控制帧，进入步骤h)；
g)付款端收到成功控制帧，声波连接建立完成；
h)付款端收到失败控制帧，回到步骤c)；
11)收款端存储秘钥K；
12)开始声波传输过程(如图7)
a)付款端对步骤9)加密后的数据进行RS编码形成数据帧；
b)付款端将数据帧进行PSK调制成音频信号；
c)付款端发送音频信号；
d)收款端接收音频信号；
e)收款端如果PSK调制、RS解码成功则发送成功的控制帧，进入步骤g)；如果失败进入步骤f)；
f)收款端发送失败的控制帧，进入步骤h)；
g)付款端收到成功控制帧，声波传输完成；
h)付款端收到失败控制帧，回到步骤c)；
13)收款端利用密钥K来DES解密识别出交易标识和信息；
14)收款端单元通过互联网向网络端数据库单元发送获取的交易标识和信息；
15)网络端通过互联网回应交易信息订单给收款端；
16)收款端通过互联网发送确认交易指令给网络端；
17)网络端处理付款；
18)网络端向收款端和付款端通过互联网发送交易成功的消息；
在发明的一种声波安全支付方法及系统，通过建立音频连接和传输过程的 协议规则，并使用DES加密、RS编解码和相移键控调制方式，实现付款端、收款端和网络端组成的线下交易方法系统。其具有如下有益效果：
1、安全性：本发明采用DES加密，加密密钥K随机生成，提供了有效的安全性，不易被攻破。
2、可靠性：本发明声波传输过程由连接建立过程和数据传输过程组成，且均为双向通信过程，具有可控的重传功能，提升了传输可靠性，即收到数据校验完成后，会通过成功或者失败的控制音频帧告知发送端接收结果，从而推动发送端进入下一阶段或者重发数据，提高了传输可靠性。此外，采用RS纠错码编成的数据帧，接收端可以纠正11个有效字节中2个错误字节，进一步提升了传输可靠性。
3、本发明在高频段(16-18kHz)发送声波信号，且采用相移键控的调制方式，通过利用载波相位表示输入信号信息的调制技术，信息依赖于载波相位的相位调制技术PSK，可以有效抵抗自然环境的声音频率干扰，体现了抗干扰性。
4、本发明采用DES加密，密钥随机生成，提供了有效的安全性，不易被攻破。
综上所述，该发明可以有效满足声波支付所需的安全性、可靠性和抗干扰性的特性，可以广泛使用于各类线下电子支付中。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种声波安全支付方法，其特征在于，包括如下步骤：
    S1、付款端建立订单并从网络端数据库获取与订单的交易数据相应的交易信息，对交易信息使用密钥进行加密并进行RS编码生成数据帧，然后对所述数据帧进行相移键控调制生成音频帧并播放相应音频；
    S2、收款端获取所述音频后对其进行相移键控解调生成数据帧，对数据帧进行RS解码后用预存的密钥进行解密生成交易信息，然后使用所述交易信息从网络端数据库获取相应的交易数据并进行显示，之后发送与所述交易数据相应的确认交易指令至网络端数据库；
    S3、当接收到确认交易指令后，网络端数据库对相应的交易数据进行付款操作。
  2. 根据权利要求1所述的一种声波安全支付方法，其特征在于，所述步骤S2中“对数据帧进行RS解码后”后还包括：
    当解码成功后，收款端播放经过相移键控调制的成功控制帧对应的成功控制音频；当解码失败后，收款端播放经过相移键控调制的失败控制帧对应的失败控制音频；
    所述付款端获取到所述成功控制音频或失败控制音频后对其进行相移键控解调生成成功控制帧或失败控制帧，并当生成失败控制帧时返回执行步骤S1中的“播放相应音频”步骤。
  3. 根据权利要求1所述的一种声波安全支付方法，其特征在于，所述“然后对所述数据帧进行相移键控调制生成音频帧并播放相应音频”前还包括声波连接建立步骤，具体为：
    S11、付款端随机生成DES密钥并对其进行RS编码形成密钥数据帧，然后将密钥数据帧进行相移键控调制成密钥音频帧并播放相应密钥音频；
    S12、收款端获取所述密钥音频后对其进行相移键控解调，并进行RS解码且判断解码是否成功；若成功则收款端存储DES密钥并播放经过相移键控调制的成功控制帧对应的成功控制音频，若失败则收款端播放经过相移键控调制的失败控制帧对应的失败控制音频；
    付款端对获取到的成功控制音频或失败控制音频进行相移键控解调得到成 功控制帧或失败控制帧，并当生成成功控制帧时进入所述“对所述数据帧进行相移键控调制生成音频帧并播放相应音频”步骤；以及当生成失败控制帧时返回步骤S11中的“播放相应密钥音频”步骤。
  4. 根据权利要求1-3任意一项所述的一种声波安全支付方法，其特征在于，所述数据帧或密钥数据帧中包含数据、开始标志和结束标志；所述成功控制帧包含开始标志、结束标志和正确标志；所述失败控制帧包括开始标志、结束标志和错误标志。
  5. 根据权利要求4所述的一种声波安全支付方法，其特征在于，所述“进行相移键控调制”的具体实现步骤包括：将所述数据帧、密钥数据帧、成功控制帧或失败控制帧的每两个bit分为一个码元经过星座图映射为I路信号和Q路信号，并将两路信号用相位差为90度的两路载波相位表示；以及将调制后的I路信号和Q路信号相加得到音频帧、密钥音频帧、成功控制音频帧或失败控制音频帧信号；
    所述“进行相移键控解调”的具体实现步骤包括：采用正交相干解调将音频、密钥音频成功控制音频或失败控制音频恢复成音频帧、密钥音频帧或控制音频帧。
  6. 一种声波安全支付系统，包括付款端、收款端和网络端数据库，所述付款端包括第一音频发送单元和第一音频接收单元，所述收款端包括第二音频发送单元和第二音频接收单元，其特征在于，所述付款端包括；
    订单建立单元，用于建立订单并从网络端数据库获取与订单的交易数据相应的交易信息；以及
    第一交易单元，用于对交易信息使用密钥进行加密并进行RS编码生成数据帧，然后对所述数据帧进行相移键控调制生成音频帧并通过第一音频发送单元播放相应音频；
    所述收款端包括：
    第二交易单元，用于通过第二音频接收单元获取所述音频后对其进行相移键控解调生成数据帧，对数据帧进行RS解码后用预存的密钥进行解码生成交易信息，以及；
    交易确认单元，用于使用所述交易信息从网络端数据库获取相应的交易数据并进行显示，之后发送与所述交易数据的确认交易指令至所述网络端数据库；
    所述网络端数据库用于当接收到确认交易指令后，网络端数据库对相应的交易数据进行付款操作。
  7. 根据权利要求6所述的一种声波安全支付系统，其特征在于，所述收款端还包括第一反馈单元，所述付款端还包括第一反馈响应单元：
    第一反馈单元用于当所述第二交易单元解密成功后，通过第二音频发送单元播放经过相移键控调制的成功控制帧对应的成功控制音频；当解密失败后，通过第二音频发送单元播放经过相移键控调制的失败控制帧对应的失败控制音频；
    第一反馈响应单元用于当所述第一音频接收单元获取到所述成功控制音频或失败控制音频后，对其进行相移键控解调生成成功控制帧或失败控制帧，并当生成失败控制帧时通知所述第一交易单元执行所述“通过第一音频发送单元播放相应音频”操作。
  8. 根据权利要求6所述的一种声波安全支付系统，其特征在于，所述第一交易单元包含第一连接单元和连接确认单元，所述第一连接单元用于随机生成DES密钥并对其进行RS编码形成密钥数据帧，然后将密钥数据帧进行相移键控调制成密钥音频帧并通过第一音频发送单元播放相应密钥音频；
    所述第二交易单元包含第二连接单元，用于当通过第二音频接收单元获取所述密钥音频后对其进行相移键控解调，然后进行RS解码并判断解调是否成功，若成功则存储DES密钥并通过第二音频发送单元播放经过相移键控调制的成功控制帧对应的成功控制音频，若失败则通过第二音频发送单元播放经过相移键控调制的失败控制帧对应的失败控制音频；
    所述第一音频接受单元，用于通过第一音频接收单元获取到的成功控制音频或失败控制音频进行相移键控解调得到成功控制帧或失败控制帧，并当生成成功控制帧时通知第一交易单元执行所述“对所述数据帧进行单音多频算法调制生成音频帧并通过第一音频发送单元播放相应音频”。
  9. 根据权利要求6-8任意一项所述的一种声波安全支付系统，其特征在于， 所述数据帧或密钥数据帧中包含数据、开始标志和结束标志；所述成功控制帧包含开始标志、结束标志，和正确标志；所述失败控制帧包括开始标志、结束标志和错误标志。
  10. 根据权利要求9所述的一种声波安全支付系统，其特征在于，所述“对所述数据帧进行相移键控调制”具体为：将数据帧、密钥数据帧、成功控制帧或失败控制帧的每两个bit分为一个码元经过星座图映射为I路信号和Q路信号，并将两路信号用相位差为90度的两路载波相位表示；以及将调制后的I路信号和Q路信号相加得到音频帧、密钥音频帧、成功控制音频帧或失败控制音频帧信号。
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