CN110738808A - Safe settlement method and system for Bluetooth code scanning guns - Google Patents
Safe settlement method and system for Bluetooth code scanning guns Download PDFInfo
- Publication number
- CN110738808A CN110738808A CN201911007075.1A CN201911007075A CN110738808A CN 110738808 A CN110738808 A CN 110738808A CN 201911007075 A CN201911007075 A CN 201911007075A CN 110738808 A CN110738808 A CN 110738808A
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- ciphertext
- secret key
- bluetooth
- data
- code scanning
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
- G07G1/00—Cash registers
- G07G1/0036—Checkout procedures
- G07G1/0045—Checkout procedures with a code reader for reading of an identifying code of the article to be registered, e.g. barcode reader or radio-frequency identity [RFID] reader
- G07G1/0081—Checkout procedures with a code reader for reading of an identifying code of the article to be registered, e.g. barcode reader or radio-frequency identity [RFID] reader the reader being a portable scanner or data reader
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
- G07G1/00—Cash registers
- G07G1/12—Cash registers electronically operated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
- H04L9/0625—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation with splitting of the data block into left and right halves, e.g. Feistel based algorithms, DES, FEAL, IDEA or KASUMI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Abstract
The invention provides a safety settlement method of Bluetooth code scanning guns, which comprises the steps of acquiring input data by the code scanning gun, encrypting the input data through a secret key to form a ciphertext, transmitting the ciphertext and the secret key to a cash register through a Bluetooth RFCOMM protocol, decrypting the ciphertext through the secret key after the cash register receives the data, and settling accounts, and also provides a safety settlement system of Bluetooth code scanning guns, wherein a transmission data format can be customized and encrypted, and the information safety in the transmission process is ensured.
Description
Technical Field
The invention relates to a safe settlement method and a system for Bluetooth code scanning guns.
Background
As shown in fig. 2, the conventional code scanning gun technology flow:
(1) the code scanning gun has a scanning function and a key function.
The scanning function is used for scanning commodity bar codes, WeChat/Paibao/cloud flash payment two-dimensional codes.
The key functions include number keys for password input, function keys for starting, volume and the like.
(2) when there is a digital key input or scan input, the information is transmitted to the output driver of the code scanning gun.
(3) The output driver passes through BT HID Slave (client), and transmits data to BTHID Host (Host) of the cash register through Bluetooth.
(4) The BT HID Host converts the Bluetooth data into input events and data. And then to the input drive.
(5) The input driver transmits the password and the payment two-dimensional code to the payment settlement module according to the data type, and the commodity bar code information is transmitted to the text output display commodity information.
(6) Payment and settlement are completed.
Wherein, HID: the Human Interface Device defines the protocol of Bluetooth in the Human-computer Interface Device;
the roles of the BT HID Slave are: when the Bluetooth keyboard is used as a Bluetooth input device, the Bluetooth keyboard and the Bluetooth mouse are similar.
The roles of the BT HID Host are: when used as a bluetooth output device. Like a computer or a mobile phone.
Disadvantage 1:
because the Bluetooth HID protocol is adopted, data is transparent and cannot be encrypted, cannot be used as a standard input and output event once being encrypted, the transmission of Bluetooth transmission data in the air can be stolen, and the user payment two-dimensional code information, the user password information and the like can be clearly known through protocol analysis.
And (2) disadvantage:
the HID protocol can only be to , then cash registers can only receive code scanning guns, and the Bluetooth mouse or the Bluetooth keyboard cannot be connected at the time.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a safe settlement method and a system for Bluetooth code scanning guns, wherein the transmission data format can be customized and encrypted, and the information safety in the transmission process is ensured.
The of the invention is realized by the method for safely settling Bluetooth code scanning guns, which comprises the following steps:
step 1, a code scanning gun acquires input data and encrypts the input data through a secret key to form a ciphertext;
step 2, the ciphertext and the secret key are transmitted to the cash register through a Bluetooth RFCOMM protocol;
and 3, after receiving the data, the cash register decrypts the ciphertext through the key to settle accounts.
, the step 1 and the step specifically include:
the code scanning gun randomly generates an 8-digit secret key, namely a DES and BASE64 algorithm secret key sample;
input data is encrypted into a DES ciphertext through DES;
then DES ciphertext is encrypted by BASE64 to become BASE64 ciphertext;
, step 3 and step are specifically that after the cash register receives the data, the cipher text is decrypted through the key to complete payment and settlement
The cash register receives data through a Bluetooth RFCOMM protocol;
analyzing the data format, judging whether the ciphertext is the ciphertext according to the mark values of the head part and the tail part of the ciphertext, if not, directly settling accounts without decrypting;
if the mark values of the head part and the tail part of the ciphertext are met, judging that the format of the ciphertext is the ciphertext format, extracting the secret key and the Base64 ciphertext;
analyzing the Base64 ciphertext by using the secret key; and (5) analyzing the DES ciphertext by using the secret key to complete decryption and settlement.
, the step 2 and the step are specifically that the encrypted data and the key are packaged according to a set data format, and the packaged data and the key are transmitted to the cash register through the Bluetooth RFCOMM protocol.
, the set format is 0x01+ Key + length + ciphertext +0x02, wherein 0x01 is the ciphertext head, Key is the secret Key, length is the ciphertext length, and 0x02 is the ciphertext tail.
The second invention is realized by that the safe settlement system of kinds of Bluetooth code scanning guns comprises:
the encryption module is used for acquiring input data by the code scanning gun and encrypting the input data by a secret key to form a ciphertext;
the transmission module transmits the ciphertext and the key to the cash register through a Bluetooth RFCOMM protocol;
and the settlement module decrypts the ciphertext through the key after the cash register receives the data, and settles the account.
, the encryption module specifically includes:
the code scanning gun randomly generates an 8-digit secret key, namely a DES and BASE64 algorithm secret key sample;
input data is encrypted into a DES ciphertext through DES;
then DES ciphertext is encrypted by BASE64 to become BASE64 ciphertext;
, the settlement module is specifically that the cash register receives data through the Bluetooth RFCOMM protocol;
analyzing the data format, judging whether the ciphertext is the ciphertext according to the mark values of the head part and the tail part of the ciphertext, if not, directly settling accounts without decrypting;
if the mark values of the head part and the tail part of the ciphertext are met, judging that the format of the ciphertext is the ciphertext format, extracting the secret key and the Base64 ciphertext;
analyzing the Base64 ciphertext by using the secret key; and (5) analyzing the DES ciphertext by using the secret key to complete decryption and settlement.
, the transmission module is specifically configured to encapsulate the encrypted data and the key according to a set data format, and transmit the encapsulated encrypted data and key to the cash register via the bluetooth RFCOMM protocol.
, the set format is 0x01+ Key + length + ciphertext +0x02, wherein 0x01 is the ciphertext head, Key is the secret Key, length is the ciphertext length, and 0x02 is the ciphertext tail.
The invention has the following advantages:
(1) the RFCOMM protocol is similar to a serial port, and the transmission data format can be customized and encrypted, so that the information security in the transmission process is ensured.
(2) The RFCOMM protocol is simpler, more mature and more stable than the HID protocol.
(3) The FCOMM protocol can support communication connection of up to 60 paths between two BT devices, namely, the cash register can support connection of a plurality of devices or a plurality of code scanning guns or other RFCOMM devices through the BT RFCOMM, and the original HID transmission can only be pairs .
Drawings
The invention is further described with reference to the following examples and figures.
FIG. 1 is a flow chart of the method of the present invention.
Fig. 2 is an architecture diagram of a prior art solution.
FIG. 3 is an architectural diagram of an embodiment of the present invention.
FIG. 4 is a flow chart of an embodiment of the present invention.
Detailed Description
As shown in FIG. 1, the safe settlement method of the Bluetooth code scanning gun of the invention comprises the following steps:
step 1, a code scanning gun randomly generates an 8-digit secret key, namely a DES and BASE64 algorithm secret key sample, input data is encrypted through DES to become a DES ciphertext, and then the DES ciphertext is encrypted through BASE64 to become a BASE64 ciphertext;
step 2, packaging the encrypted data and the secret key according to a set data format, and transmitting the packaged data and the secret key to a cash register through a Bluetooth RFCOMM protocol, wherein the set format is as follows: 0x01+ Key + length + ciphertext +0x 02; wherein 0x01 is a ciphertext header; key is a secret Key; length is the ciphertext length; 0x02 is ciphertext trailer;
step 3, the cash register receives data through a Bluetooth RFCOMM protocol; analyzing the data format, judging whether the ciphertext is the ciphertext according to the mark values of the head part and the tail part of the ciphertext, if not, directly settling accounts without decrypting; if the mark values of the head part and the tail part of the ciphertext are met, judging that the format of the ciphertext is the ciphertext format, extracting the secret key and the Base64 ciphertext; analyzing the Base64 ciphertext by using the secret key; and (5) analyzing the DES ciphertext by using the secret key to complete decryption and settlement.
The invention relates to a safe settlement system of a Bluetooth code scanning gun, which comprises:
the encryption module is used for randomly generating an 8-digit secret key by a code scanning gun, and enabling DES and BASE64 algorithm secret keys to be similar, wherein input data is encrypted by DES to become a DES ciphertext, and then the DES ciphertext is encrypted by BASE64 to become a BASE64 ciphertext;
the transmission module encapsulates the encrypted data and the secret key according to a set data format, and transmits the encapsulated encrypted data and the secret key to the cash register through a Bluetooth RFCOMM protocol, wherein the set format is as follows: 0x01+ Key + length + ciphertext +0x 02; wherein 0x01 is a ciphertext header; key is a secret Key; length is the ciphertext length; 0x02 is ciphertext trailer;
the cash register receives data through a Bluetooth RFCOMM protocol; analyzing the data format, judging whether the ciphertext is the ciphertext according to the mark values of the head part and the tail part of the ciphertext, if not, directly settling accounts without decrypting; if the mark values of the head part and the tail part of the ciphertext are met, judging that the format of the ciphertext is the ciphertext format, extracting the secret key and the Base64 ciphertext; analyzing the Base64 ciphertext by using the secret key; and (5) analyzing the DES ciphertext by using the secret key to complete decryption and settlement.
kinds of specific implementation modes of the invention:
as shown in fig. 3, the present invention comprises the steps of:
(1) the code scanning gun has a scanning function and a key function.
The scanning function is used for scanning commodity bar codes, WeChat/Paibao/cloud flash payment two-dimensional codes.
The key functions include number keys for password input, function keys for starting, volume and the like.
(2) when there is a digital key input or scan input, the information is transmitted to the output driver of the code scanning gun.
(3) The output driver encrypts the data at the same time, and transmits the encrypted data to the cash register through the Bluetooth RFCOMM protocol.
(4) And after receiving the data, the cash register decrypts the data, and converts the decrypted data into the input equipment event and data. And then to the input drive.
(5) The input driver transmits the password and the payment two-dimensional code to the payment settlement module according to the data type, and the commodity bar code information is transmitted to the text output display commodity information.
(6) Payment and settlement are completed.
The difference from the existing scheme is as follows:
(1) the wireless transmission does not use the HID of bluetooth, but the RFCOMM protocol of bluetooth. The RFCOMM provides serial port simulation based on an L2CAP protocol, and as the RFCOMM is only used for transmitting data like a serial port, a receiving end converts the data into an input event after receiving the data. An Input event conversion interface provided by Android: inpjectinputevent ().
(2) As the RFCOMM is similar to serial port transmission, the transmission data format can be customized, defined and encrypted.
Data format customization and encryption
1. The information field of the RFCOMM is originally just filled with the original input data we want to transmit.
2. The new data format filled in the information field of the scheme is as follows:
0x01+ Key + length (4 bytes of BASE64 ciphertext length) + BASE64 ciphertext +0x02
0x01 ciphertext header
Key: an 8-bit digital key is fixed.
length: 4 bytes of base64 ciphertext length
0x 02: ciphertext trailer
3. As shown in fig. 4, the encryption and decryption processes:
sweep yard rifle and encrypt end:
(1) the code scanning gun driver dynamically and randomly generates an 8-bit secret key, namely a DES and BASE64 algorithm secret key ;
(2) input data is encrypted into a DES ciphertext through DES;
(3) then DES ciphertext is encrypted by BASE64 to become BASE64 ciphertext;
(4) data encapsulation is carried out according to a data format of '0 x01+ Key + length (4 bytes of BASE64 ciphertext length) + BASE64 ciphertext +0x 02';
(5) transmit to the cash registering machine through bluetooth RFCOMM.
The cash register decipher end:
(1) the Bluetooth RFCOMM receives the incoming Bluetooth data;
(2) analyzing the data format, judging whether the data format is a ciphertext according to the mark values of the head part and the tail part of the ciphertext, if the data format is not the ciphertext, not needing decryption, and directly transmitting the data format to related applications according to normal encryption-free RFCOMM data;
(3) if the mark values of the head part and the tail part of the ciphertext are met, judging that the format of the ciphertext is the ciphertext format, extracting a ciphertext secret key and a Base64 ciphertext;
(4) parsing Base64 ciphertext using keys
(5) And analyzing the DES ciphertext by using the secret key to generate a plaintext of the original input data.
(6) The input driver transmits the password and the payment two-dimensional code to the payment settlement module according to the type of the input data, and the commodity bar code information is transmitted to the text output display commodity information. Thus, the settlement is completed safely and finally.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (10)
1, kinds of bluetooth sweep the safe settlement method of the yard rifle, wherein including:
step 1, a code scanning gun acquires input data and encrypts the input data through a secret key to form a ciphertext;
step 2, the ciphertext and the secret key are transmitted to the cash register through a Bluetooth RFCOMM protocol;
and 3, after receiving the data, the cash register decrypts the ciphertext through the key to settle accounts.
2. The safe settlement method of kinds of Bluetooth code scanning guns according to claim 1, wherein the step 1 further specifically comprises:
the code scanning gun randomly generates an 8-digit secret key, namely a DES and BASE64 algorithm secret key sample;
input data is encrypted into a DES ciphertext through DES;
the DES ciphertext is then encrypted by BASE64 to become BASE64 ciphertext.
3. The safe settlement method of kinds of Bluetooth code scanning guns according to claim 2, wherein the step 3 further specifically comprises:
the cash register receives data through a Bluetooth RFCOMM protocol;
analyzing the data format, judging whether the ciphertext is the ciphertext according to the mark values of the head part and the tail part of the ciphertext, if not, directly settling accounts without decrypting;
if the mark values of the head part and the tail part of the ciphertext are met, judging that the format of the ciphertext is the ciphertext format, extracting the secret key and the Base64 ciphertext;
analyzing the Base64 ciphertext by using the secret key; and (5) analyzing the DES ciphertext by using the secret key to complete decryption and settlement.
4. The safe settlement method for Bluetooth code scanning guns as claimed in claim 1, wherein the step 2 further comprises packaging the encrypted data and the secret key according to a set data format, and transmitting the packaged data and secret key to the cash register via Bluetooth RFCOMM protocol.
5. The safe settlement method for Bluetooth code scanning guns according to claim 4, wherein the set format is 0x01+ Key + length + ciphertext +0x02, wherein 0x01 is the head of the ciphertext, Key is the Key, length is the length of the ciphertext, and 0x02 is the tail of the ciphertext.
6. kind of bluetooth sweep the safe settlement system of sign indicating number rifle, its characterized in that includes:
the encryption module is used for acquiring input data by the code scanning gun and encrypting the input data by a secret key to form a ciphertext;
the transmission module transmits the ciphertext and the key to the cash register through a Bluetooth RFCOMM protocol;
and the settlement module decrypts the ciphertext through the key after the cash register receives the data, and settles the account.
7. The kinds of Bluetooth code scanning gun security settlement system of claim 6, wherein the encryption module further steps are specifically:
the code scanning gun randomly generates an 8-digit secret key, namely a DES and BASE64 algorithm secret key sample;
input data is encrypted into a DES ciphertext through DES;
the DES ciphertext is then encrypted by BASE64 to become BASE64 ciphertext.
8. The kinds of Bluetooth code scanning gun security settlement system of claim 7, wherein the settlement module specifically comprises:
the cash register receives data through a Bluetooth RFCOMM protocol;
analyzing the data format, judging whether the ciphertext is the ciphertext according to the mark values of the head part and the tail part of the ciphertext, if not, directly settling accounts without decrypting;
if the mark values of the head part and the tail part of the ciphertext are met, judging that the format of the ciphertext is the ciphertext format, extracting the secret key and the Base64 ciphertext;
analyzing the Base64 ciphertext by using the secret key; and (5) analyzing the DES ciphertext by using the secret key to complete decryption and settlement.
9. The kinds of Bluetooth code scanning gun security settlement system of claim 6, wherein the transmission module is further configured to encapsulate the encrypted data and the secret key according to a set data format, and transmit the encapsulated data and secret key to the cash register via a Bluetooth RFCOMM protocol.
10. The safe settlement system for Bluetooth code scanning guns according to claim 9, wherein the setting format is 0x01+ Key + length + ciphertext +0x02, wherein 0x01 is the header of the ciphertext, Key is the Key, length is the length of the ciphertext, and 0x02 is the tail of the ciphertext.
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| CN201911007075.1A CN110738808A (en) | 2019-10-22 | 2019-10-22 | Safe settlement method and system for Bluetooth code scanning guns |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111833042A (en) * | 2020-05-14 | 2020-10-27 | 上海世麦智能科技有限公司 | Synchronous data processing method and system for scanning terminal communication |
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