Abstract: A microfluidic ion detection chip having a bubble brightening structure includes a substrate, an upper plate, two glass cover plates, and a foam board. The substrate is provided with a fluid mixing region, a lower optical detection through hole, and a lower gas flow channel. The upper plate is adhesively connected to the substrate and is provided with a sample outlet, an upper optical detection through hole, an upper gas flow channel, and two sample inlets, the upper gas flow channel and the lower gas flow channel are combined to form a gas flow channel. The two glass cover plates are respectively disposed at the lower optical detection through hole and the upper optical detection through hole. The foam board is provided with a foaming structure capable of generating bubbles and a surfactant coated on the foam board, the foam board is disposed at the gas flow channel.

Abstract: Method for performing dual verification to login into a Windows operating system, wherein in the case that a first function of a device driver is invoked by the Windows operating system, initializing, by the device driver, a first data structure; storing a second data structure self-defined in the first data structure; returning the first data structure to the Windows operating system; and in the case that a sixth function of the device driver is invoked, popping up, by the device driver, a verification box according to a login interface window handle in the second data structure, prompting a user to input both a PIN code and biological feature information. The present invention makes the user to conveniently verify his/her identity via both PIN code and biological feature when the user safely logins into the Windows operating system.

Abstract: A method for communicating with a fingerprint card to perform transaction, comprising the following steps: receiving a Processing Options Data Object List (PDOL) request from a terminal, sending a waiting time extending instruction at a preset interval, obtaining and verifying a user's fingerprint, determining a specific transaction type from the PDOL request, matching the terminal type, ensuring the transaction is not refused by an application controller, and returning a response with an Application Interchange Profile (AIP) and Application File Locator (AFL) to the terminal. It also involves returning a read record based on the AFL. According to the present invention, a process of using the fingerprint card includes an additional step of verifying the fingerprint. Once the fingerprint verification is successful, there is no need to enter a password or sign anymore. This solves the problem of being unable to use any smart card due to forgetting its password.

Abstract: The present disclosure discloses are an implementation method and apparatus for an application installation on a smart Point of Sale device. The method includes: starting, by an application providing a system interface, an installation service for the mobile management application when judging that a mobile management application update package path received in a broadcast is not empty. According to the saved mobile management application update package, it starts to silently install a new version of the mobile management application. If the installation is successful, the mobile management application update package is changed to the mobile management application successful update file, and the new version of the mobile management application is started. If the installation fails, the mobile management application update package is changed to the mobile management application update failure file, and the old version of the mobile management application is started.

Abstract: A permission control method for NFT circulation data, comprising: receiving an instruction and determining the type; if the instruction is an NFT resource authorization instruction and is verified to be legitimate, calling a smart contract NFT resource authorization interface, and determining whether an authorized address is a target address, and if not, adding a first data structure to the smart contract to complete NFT resource authorization; and, if the instruction is an authorization recovery instruction and is verified to be legitimate, broadcasting the authorization recovery instruction, and, according to a pre-stored smart contract address, querying a smart contract execution code, and, when it is verified, by means of a pre-stored public key of the target address, that a signature of an authorization recovery transaction in the authorization recovery instruction is correct, and it is determined that the NFT resource quantity owned by the target address is sufficient and the authorized address is not t

Abstract: A method for parsing circulation data in a PB format, which includes: setting, by a terminal, a start identification and an end identification for to-be-signed data extracted from a cache; calling a preset function to split the to-be-signed data to obtain a splitting result, and updating the start identification and the end identification respectively according to a length of parameter data in the splitting result to obtain an updated start identification and an updated end identification; generating, by the terminal, a signing request, and sending the signing request to a hardware device to which the terminal is connected, parsing, by the hardware device, the signing request when a signature result obtaining request is received, determining to-be-displayed data according to parameter data in a parsing result, and displaying the to-be-displayed data; and generating, by the hardware device, a private key according to a private key derived address parsed from the signing request, and signing the to-be-signed da

Abstract: A current sensing device may include an integrated trace type current sensor assembly. The current sensor assembly may include a chip body, an integrated electrical conductor, and a current sensor. The current sensor measures an amount of first current that flows through the integrated electrical conductor. The current sensing device may also include an external resistive element connected in parallel to the integrated electrical conductor. A second current may flow through the external resistive element. The amount of the first current measured by the current sensor is indicative of a total current that is a sum of the first current and the second current. The total current may be determined based on the amount of the first current measured by the current sensor, based on a first resistance value of the integrated electrical conductor, and based on a second resistance value of the external resistive element.

Abstract: Embodiments described herein relate to a DC current measurement circuit, a method of DC current measurement and an electronic device including the DC current measurement circuit. The DC current measurement circuit includes a shunt resistor, an LPF, and an amplifier. The shunt resistor is electrically connected in a current path and configured to convert a current flowing through the current path to a voltage signal. The LPF is electrically connected to the shunt resistor and configured to receive the voltage signal from the shunt resistor and output a filtered voltage signal. The amplifier is connected to the LPF and configured to receive the filtered voltage signal and provide a measurement signal. The measurement signal provides a measurement of the current flowing through the current path.

Abstract: The invention provides a working key generation method and device and a computer readable storage medium, and belongs to the technical field of information security. The method comprises the following steps: the terminal receiving an operation instruction sent by an upper computer, obtaining a working key purpose and a working key algorithm according to the operation instruction, setting the working key purpose as a first purpose by the terminal, generating derived data according to the first purpose, a master key identifier, a first numerical value and a master key algorithm, determining the length of a working key according to the working key algorithm, obtaining data in a working key buffer area as a key, generating the working key according with the length of the working key according to the key and the derived data, executing corresponding operation according to the operation instruction and the working key, and returning an operation result to the upper computer.

Abstract: Method for increasing a number of certificates, in which a data endpoint address is set to be an endpoint address of a Chip/Smart Card Interface Devices (CCID) interface that receives instruction data, so Application Protocol Data Unit (APDU) data used for authentication of a Personal Identity Verification (PIV) application of a key device are obtained and sent to the PIV application. The PIV application calls an Application Programming Interface (API) interface to obtain a CCID interface number, obtains a PIV device certificate number according to a general device certificate number in the APDU data and the CCID interface number, obtains a PIV certificate according to the PIV device certificate number, and operates according to the PIV certificate to obtain operation results returned by a virtual machine of the key device to an upper computer according to the data endpoint address. The method overcomes limitation of the number of certificates.

Abstract: Method for automatically unlocking a screen, which comprises: sending a broadcast carrying a uuid value, when a terminal equipment determines that an equipment to which the broadcast belongs is a connectable equipment according to a signal strength of the broadcast and the uuid value, receiving a Bluetooth connection establishment request sent by the terminal equipment, establishing a Bluetooth connection with the terminal equipment based on the Bluetooth connection establishment request, acquiring to-be-signed data carried in an authentication login instruction, signing the to-be-signed data according to a stored private key to obtain a signature result, and sending the signature result to the terminal equipment, so that the terminal equipment executes an automatic screen unlocking operation according to the signature result.

Abstract: A method for realizing OTG communication without plugging and unplugging includes: when an apk file of an application is generated, the application presets device information of an associated USB device; when the USB device is connected to a terminal device, a system of the terminal device recognizes an application qualified for initiation according to the device information of the connected USB device; a target application is initiated according to the application qualified for initiation and a user selection result; and the target application initiates a processing thread so as to establish OTG data communication with the connected USB device.

Abstract: An implementation method for an encrypted USB flash disk system. A virtual drive letter is bound to an device object and then mapped; driver software wafts for an operation of an operating system on the device object; the driver software determines, according to the operation of the operating system on different device objects, the type of a received instruction; if the received instruction is a reading instruction, the driver software maps a read address in a storage chip according to a first address in the reading instruction, reads data, and calls an encryption lock chip to decrypt the read data to obtain decrypted read data; and if the received instruction is a writing instruction, the driver software calls the encryption lock chip to encrypt data to be written to obtain encrypted write data, maps a write address in the storage chip according to a second address in the writing instruction, and writes the encrypted write data or refuses the operation.

Abstract: The invention provides a data processing method and device and a computer readable storage medium, and belongs to the technical field of card reader communication. The method comprises the Steps: enabling a card reader to receive and analyze a data packet which is sent by a host and conforms to a first data structural formula, judging whether a first preset field in the data packet is the same as an address of the card reader or not, if yes, determining a data packet verification mode, and verifying the data packet according to the data packet verification mode; and if the verification is passed, determining whether the data packet contains security data, if so, processing the security data in the data packet according to the key to obtain plaintext data, determining a command type, executing corresponding operation according to the command type and the plaintext data, and returning a response data packet conforming to the first data structural formula to the host.

Abstract: A method for implementing a dongle, comprising: a security chip of a dongle determining whether a secure digital (SD) card in a card slot of the dongle is a valid SD card; if the SD card is a valid SD card, when a received instruction is a first/second USB flash drive area access instruction sent by a system, executing an operation of accessing the first/second USB flash drive area; when the received instruction is a PIN code verification instruction for the second USB flash drive area or an encryption area sent by an upper layer, executing a PIN code verification operation on the second USB flash drive area or the encryption area; when the received instruction is a read/write instruction for the encryption area sent by the upper layer, executing a read/write operation on the encryption area; if the SD card is an invalid SD card, when the received instruction is a partitioning instruction, the security chip of the dongle executing a partitioning operation according to a partition information table in the part

Abstract: A method for implementing replacing a startup screen of a smart POS device includes: checking, by the smart POS device, whether an updating screen completing flag exists when detecting a startup, if yes, displaying a corresponding startup screen according to a mirror file in a backup partition, otherwise, displaying a default startup screen according to a screen mirror file in a default startup screen partition; decrypting a received image data ciphertext by using a protection key, verifying data obtained by decrypting, if successful, generating a mirror file of the startup screen according to the data and storing the mirror file; applying for writing access to the backup partition; if the backup partition has a writing permission, clearing the updating screen completing flag and starting to write the stored mirror file in the backup partition; setting the updating screen completing flag after the mirror file is written in the backup partition.

Abstract: The present application presents a method and an apparatus for synchronizing time by parsing satellite navigation data. A service application obtains current time of a system and caches it as a first time variable, receives and parses the satellite navigation data to obtain all character strings, obtains a character string as a current character string to be processed, determines a type of a system protocol identifier, if it is a preset system protocol identifier, converts a time field of the current character string to be processed into a local time zone time value for storing, obtains the current time and stores it as a second time variable, obtains a first time compensation value according to the first and second time variables, obtains satellite navigation time according to the first time compensation value and the maximum local time zone time value and sets system time as satellite navigation time.

Abstract: A data transmission method, comprising: when a device receives first data sent by an upper computer, parsing the first data to acquire a first content hash value, a first hash value and a first length; performing signature verification on the first data according to a stored first public key; when the signature verification is successful, waiting to receive a data block sent by the upper computer; when the data block is received, verifying the data block according to the first hash value and the first length; and when the verification for the data block is successful, parsing the current data block to obtain the length and the hash value of a next data block and payload data of the current data block, and decrypting the payload data to obtain a payload data plaintext. According to the technical solution of the present invention, the process of data transmission is more secure and efficient.

Abstract: A method and system for communicating with an authenticator, which belongs to communication technology field.