A device comprising: an optical emitter for emitting light having an emitted optical spectrum; an optical sensor for receiving light reflected from a tag attached to an object; and a processor configured to: determine a reflected optical colour spectrum of the light reflected from the tag based on an output of the optical sensor; retrieve an optical signature associated with said object from memory; and determine the authenticity of said object based on comparing the optical signature and the reflected optical colour spectrum.

Education curricula materials include encoded indicia such as a QR code that contains information related to identifying requested augmented reality image data from a server over a network. By scanning the QR code, a computer uses its decoding software to create a data set for transmitting to the server. The data set may include an identifier for selected augmented reality image data associated with the user's curriculum, information about the curriculum at issue, the academic level of the user, and any other data necessary to ensure that the most appropriate augmented reality image data is transmitted back to the computer. The server transmits comprehensive augmented reality image data back to the computer for viewing on a computerized display accessible by a student. Part of the content may include an interactive pedagogical agent that helps the student with a part of the instruction related to a portion of the curriculum.

Devices, systems, and methods for contactless vehicle codes are presented. A method may include receiving, by a vehicle, a first request to present a code associated with an activity. The method may include sending a second request to a device, the second request indicative of the activity. The method may include receiving, from the device, the code, wherein the code includes information associated with the activity. The method may include presenting, using a display of the vehicle, the code.

A method may include generating, by a computing device, a first dynamic QR code comprising a plurality of QR code frames, each QR code frame transmitted at a first frequency, the plurality of QR code frames comprising non-viable QR code frame(s) and at least one viable QR code frame. The method may include displaying, by the computing device, the first dynamic QR code, the at least one viable QR code frame displayed at a first time. The method may include transmitting, by the computing device, a first pulse to a user device. The method may include capturing, by the user device at the first time and in response to receiving the first pulse, the at least one viable QR code frame. The method may include generating and displaying, by the user device, a second dynamic QR code, causing the computing device to complete a requested transaction.

One embodiment provides a method and system for joint payment. During operation, a joint-payment server receives a joint-payment request comprising an identifier of a user initiating a joint payment and an identifier of a user to-be-included in the joint payment; determines, based the identifiers of the user initiating the joint payment and the to-be-included user, whether a binding relationship has been established between the user initiating the joint payment and the to-be-included user; in response to determining that the binding relationship has been established, generates graphic codes respectively corresponding to the user initiating the joint payment and the to-be-included user; and sends the graphic codes to a terminal device associated with the user initiating the joint payment, thereby facilitating the terminal device to display the graphic codes to complete the joint payment.

In an approach for enabling communication between offline devices to perform secure transaction, a processor sends information in an optically recognizable first code including a response type, an identity of the first device and a type of optical reader associated with the first device. A processor receives encoded information in an optically recognizable second code. A processor extracts a user identifier and the one-time password associated with the registered second device. A processor determines that a user certificate associated with the user identifier exists in a local repository. A processor validates the one-time password associated with the registered second device with the user certificate using a public certificate associated with the first device, the one-time password associated with the registered second device and the one-time password seed. A processor authenticates the user.

When change back is due to a customer at a transaction terminal after a cash payment made by the customer during checkout, a code is generated and rendered on a display of the terminal. The customer captures the code with a camera of a customer-operated device causing a mobile application to launch on the device requesting that the customer designate how the customer wants the change back to be provided. The customer can select a loyalty wallet, a digital wallet, and/or a donation wallet for transferring some or all of the change back. The designated amount of the change back is transferred to the customer-selected wallet(s) and any remaining cash bills still due to the customer as remaining change back is provided to the customer and the transaction concludes at the terminal.

In a system and a method of the invention at least one food and/or drinks serving facility is provided, an electronic device of each of a plurality clients has an application with a QR code allowing a client to receive from it food and drink free of charge without any obligation to purchase it, the client can select a food and/or a drink which he/she wants to receive from the serving facility and shows to a cashier the OR code of the application on his/her electronic device, so that the cashier can read it and ascertain that the application is appropriate and valid, and then the client can receive from the serving facility the selected food and/or drink for free without any payment a certain number of times.

A data-transmission system, comprising measurement means, having memories, to create and collect measurement data, an output device having a zero-power passive state, to show in the zero-power passive state, machine-readable code containing the measurement data created using the measurement means, a power supply for the output device and the measurement means, a server arrangement to process and/or store the measurement data, and one or several reader devices to read the code from the output device in the zero-power passive state and arranged for data transfer with the server arrangement. The output device and measurement means with memories are to be arranged at monitoring objects.

Disclosed are a method and device for recognizing a two-dimensional bar code for improving the efficiency of recognizing the two-dimensional bar code. The method comprises: a relative position of a household appliance and a terminal device is determined during network configuration of the household appliance; a display parameter for displaying the two-dimensional bar code is determined according to the relative position, wherein the display parameter comprises a size of the two-dimensional bar code to be displayed and the two-dimensional bar code carries device information of the household appliance; the display parameter is sent to the household appliance to enable the household appliance to display a two-dimensional bar code picture according to the display parameter; and the two-dimensional bar code picture is recognized to obtain the device information of the household appliance.