Feitian Technologies Co., Ltd.

Methods for implementing thermal printing, including: calculating the number of printable dots based on power information of an electronic device and power consumption of single-dot printing; parsing the received printing instruction to obtain data to be printed and convert it into a two-dimensional dot-matrix pattern, taking information of each row in the pattern sequentially as current information to be printed; if the number of ink dots in the current information to be printed is greater than the number of printable dots, segmenting the current information to be printed based on the number of printable dots; keeping ink-dot positions in information of each segment unchanged, and filling other positions with zeroes to obtain virtual line information; energizing heating elements at corresponding positions on the print head for a preset duration based on the ink-dot positions in each piece of virtual line information sequentially, and controlling a motor to feed paper.

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.

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.

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.

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 data parsed from the signing request with the private key. According to the present invention, the hardware device can rapidly parse the circulation data in the PB format, thereby achieving the effect that “what you see is what you sign”.

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 the target address, modifying the first data structure according to a first preset mode to complete authorization recovery. By means of the method, a user can recover an authorized permission, thus achieving permission management after resource authorization, and avoiding security risks.

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. Compared with an encryption scheme in the prior art, the method provided by the invention is safer and wider in application range.

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.

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. Accordingly, a locked screen can be quickly and automatically unlocked through an automatic unlocking processing based on the Bluetooth connection, so that the method has a relatively high safety.