An electronic transaction card communicates with an add-on slot of an intelligent electronic device. The add-on slot may be a memory card slot. The intelligent electronic device may be a mobile phone or other device with or without network connectivity. The electronic transaction card may have magnetic field producing circuitry compatible with magnetic card readers, smartcard circuitry, other point-of-sale interfaces, or any combination thereof.

Methods and systems for tracking a supply chain of a package by using a barcode and a plurality of mobile devices are provided. The methods at least includes issuing and scanning the barcode at an initial location, pairing the barcode with a first mobile device, receiving transaction information of the package to update the barcode to include the transaction information, validating the barcode with a first digital signature, unpairing the barcode with the first mobile device, scanning the barcode by a second mobile device, and pairing the barcode with the second mobile device, validating the barcode with a second digital signature, tracking a location of the package that is moving along with the second mobile device. Tracking is continued until the package is arrived at a final destination. Validated data is further confirmed by a third party to increase credibility of tracking information.

An electronic transaction card communicates with an add-on slot of an intelligent electronic device. The add-on slot may be a memory card slot. The intelligent electronic device may be a mobile phone or other device with or without network connectivity. The electronic transaction card may have magnetic field producing circuitry compatible with magnetic card readers, smartcard circuitry, other point-of-sale interfaces, or any combination thereof.

A security document with a first security element, which includes a first item of visually recognizable and in particular machine-readable information, and a second security element, which includes a second item of in particular machine-readable information which can be used to verify the first item of information. A method for the authentication thereof is also described.

An electronic transaction card communicates with an add-on slot of an intelligent electronic device. The add-on slot may be a memory card slot. The intelligent electronic device may be a mobile phone or other device with or without network connectivity. The electronic transaction card may have magnetic field producing circuitry compatible with magnetic card readers, smartcard circuitry, other point-of-sale interfaces, or any combination thereof.

A security document with a first security element, which includes a first item of visually recognizable and in particular machine-readable information, and a second security element, which includes a second item of in particular machine-readable information which can be used to verify the first item of information. A method for the authentication thereof is also described.

A wearable device receives ticket information for an event and information indicating a quantity of funds allocated from an account, associated with a user of a user device, to the wearable device, and stores the ticket information and the information indicating the quantity of funds. The wearable device utilizes a wireless component to pair the wearable device and the user device, and provides, to the user device and via the wireless component, the ticket information and information indicating access privileges for the event. The wearable device generates a token for a PoS device for a charge incurred at the event during an offline transaction with the PoS device, and provides, via a NFC component, the token to the PoS device. The wearable device provides, to the user device and via the wireless component, information indicating that that the token was provided to the PoS device.

A security document with a first security element, which includes a first item of visually recognizable and in particular machine-readable information, and a second security element, which includes a second item of in particular machine-readable information which can be used to verify the first item of information. A method for the authentication thereof is also described.

A mobile device includes a smartcard controller that does not rely on power received from an interrogating RF field. The mobile device also includes a small inductive device capable of inductive coupling with an RFID reader. The smartcard controller includes circuitry to modulate an impedance of a port coupled to the inductive element when in the presence of an interrogating RF field at substantially 13.56 MHz.

One embodiment provides a wristband, including: a wristband material; an padding material; and at least two antennas, wherein the at least two antennas are located between the wristband material and the padding material; wherein the at least two antennas are located having a spacing between each of the at least two antennas with respect to another of the at least two antennas; wherein the wristband material, the padding material, and the at least two antennas are formed as a wearable wristband. Other aspects are described and claimed.