An electronic device may include a transmission circuit and an inductive element. The inductive element may be configured to generate a wireless communication signal based on a current. The transmission circuit may be configured to output the current based on a supply voltage; to increase an intensity of the current, from zero to an increased intensity that is less than or equal to a target value, by alternately repeating a first increase and a first decrease of the intensity of the current, in a first time interval; to decrease the intensity of the current, from the increased intensity to zero, by alternately repeating a second increase and a second decrease of the intensity of the current, in a second time interval.

The present invention discloses a user identification card control method, a terminal, and a computer storage medium. The user identification card control method include: when intercommunication with a user identification card is needed, generating an access request; based on the access request, querying the access permission of the corresponding user identification card and, in response to having the access permission of the user identification card, controlling the connection path of the user identification card to be turned on to implement the intercommunication with the user identification card. The beneficial effect of implementing the present invention is that two processors can control and intercommunicate with two user identification cards, and thus achieve flexible access to the two user identification cards by the two processors.

A transaction card construction and a method for making transaction cards provides increased security for transaction card magnetic strips. The transaction card construction includes a card inlay and a clear card body. The card inlay is formed via a lamination press process with the magnetic strip attached to a back surface of the card inlay. The card body may have a window through which a data storage element may be exposed for accessing, such as by a magnetic stripe reader or EMV chip reader. The card body may be formed by adhering the card inlay to the clear card body.

The present invention is a packaged electronic module with embedded electronics for use in smart cards. This invention assembles a plurality of electronics components on a flexible printed circuit, together with an integrated circuit chip and a contact plate, into a module. This module can then be embedded into a plastic card, using regular milling techniques, by a card manufacturer. This method packages the plurality of electronics components into a module. The present invention provides a business with the capability to avoid additional capital expenditure required for special equipment and enables all existing card manufacturers to manufacture smart cards with embedded electronics.

A card, such as a payment card, or other device may include an electronics package. The electronics package may include electronic components mounted on a flexible, printed circuit board. The electronics package may be laminated (e.g., via a hot, cold, or molding lamination process) between layers of transparent polymer. A hologram may be fixed to one side of the electronics package such that the hologram may be viewed from the exterior of the laminated card having transparent polymer layers. As such, the hologram may not be removed without breaching the integrity of a transparent polymer layer.

A service providing system includes a service providing portion and an input portion. The service providing portion provides a predetermined service to a user. The input portion is where authentication information is input when the service providing portion provides the service, and authentication is performed based on the authentication information. A plurality of cards on which a plurality of authentication signs are indicated are provided to the user beforehand. The authentication information is composed of the plurality of authentication signs extracted from the plurality of cards.

A smart card read/write method is performed at a terminal, including: sensing a touch event of a smart card, and obtaining an application identifier corresponding to the touch event; searching for a third-party application link corresponding to the application identifier, and capturing and displaying a web page corresponding to the third-party application link, the web page comprising a function menu and an instruction script corresponding to options in the function menu being preselected from a preset standard script library; obtaining an option triggered in the function menu on the web page, and sending a smart card control request to a platform application server by executing an instruction script corresponding to the triggered option; and receiving a smart card control instruction returned by the platform application server, and invoking a corresponding interface function according to the smart card control instruction to read/write the smart card.

A transaction card construction and a method for making transaction cards provides increased security for transaction card magnetic strips. The transaction card construction includes a card inlay and a clear card body. The card inlay is formed via a lamination press process with the magnetic strip attached to a back surface of the card inlay. The card body may have a window through which a data storage element may be exposed for accessing, such as by a magnetic stripe reader or EMV chip reader. The card body may be formed by adhering the card inlay to the clear card body.

A transaction card is described. The transaction card includes a card body that is made from metal. The metal may be a precious metal alloy, such as gold. The transaction card includes a polished area and a contrasting area on the card body. The transaction card additionally includes information. At least a portion of the information is engraved into the polished area.

Transaction cards are disclosed. In one embodiment, a transaction card may include: a substrate having a top surface and a bottom surface; a chip comprising a plurality of electrical contacts and positioned in the substrate below the top surface of the substrate; and a first conductive material provided between the plurality of electrical contacts and the top surface of the substrate, wherein the first conductive material provides an electrical connection to the chip such that the chip is readable by a chip reading device. The chip may not be visible from the top surface of the substrate.