An encrypted multimedia streams transceiving method between a first and second user, includes using a device for transceiving multimedia streams connected to a respective electronic computer by both users; the method including a step of preventive activation of a free-to-air communication session between the users through a software for making multimedia communications within which the device operates in a first free-to-air transmission configuration, a step of creating an encrypted communication, within which the device operates in a second encrypted transceiving configuration; a step wherein the device causes the opening of a session for the transfer of encrypted data between the electronic computers, different from the free-to-air communication session used by the software for making calls, and at least audio data stream transceived between the two users during their communication is selectively switched between the free-to-air communication session and the encrypted data transfer session on the basis of a predefined criterion.

Radio frequency identification (RFID) enabled devices are presented. In some examples, a RFID tag may be arranged on the device and the device may further include a RFID tag mode modifier which is configured to transfer the mode or state of the RFID tag from a first mode, such as an inactive mode, to a second mode, such as an active or enabled mode, or vice versa. For instance, the RFID tag mode modifier may transfer the RFID tag from an inactive mode or state to an active mode or state in which the RFID tag may be enabled for use, or vice versa. The RFID tag mode modifier may be an activation button, a contact region, or a physical device configured to prevent transmission of RFID signals. One or more methods of generating or using the devices described herein are also provided.

A device (100) comprising a Radio Frequency Identification transponder and means for selectively controlling the Radio Frequency Identification communication, the device (100) comprising: a first, internal, electromagnetic shield fixed on one side of the Radio Frequency Identification transponder's antenna and a second, internal, electromagnetic, movable shield (180) on the other side of the Radio Frequency Identification transponder's antenna wherein the device (100) comprises an internal actuator (170) configured to operate a movable mechanism (150), influencing the position of the movable shield, such that when the internal actuator is in a first position, the movable shield is in a first position allowing communication with the Radio Frequency Identification transponder and when the internal actuator is in a second position, the movable shield is in a second position, in which it blocks all contactless communication with the Radio Frequency Identification transponder.

A device (100) comprising a Radio Frequency Identification transponder and means for selectively controlling the Radio Frequency Identification communication, the device (100) comprising: a first, internal, electromagnetic shield fixed on one side of the Radio Frequency Identification transponder's antenna and a second, internal, electromagnetic, movable shield (180) on the other side of the Radio Frequency Identification transponder's antenna wherein the device (100) comprises an internal actuator (170) configured to operate a movable mechanism (150), influencing the position of the movable shield, such that when the internal actuator is in a first position, the movable shield is in a first position allowing communication with the Radio Frequency Identification transponder and when the internal actuator is in a second position, the movable shield is in a second position, in which it blocks all contactless communication with the Radio Frequency Identification transponder.

Systems and methods for operating an RFID transponder (102). The methods involve: performing energy harvesting operations by a voltage scavenging device (130) of the RFID transponder to collect energy from an RF field, magnetic field, heat, light or movement of the RFID transponder; increasing or decreasing, by a voltage converter of the RFID transponder, a voltage level of a signal received from the voltage scavenging device to a sub-threshold voltage level that is at least one order of magnitude below a normal operating range for the RFID transponder; and supplying an operating voltage at the sub-threshold voltage level to at least a transceiver circuit (124) of the RFID transponder.

In an aspect, the present invention provides a document, comprising an RFID inlay, a shield element and a support portion, wherein the shield element, the support portion, and the RFID inlay are provided in a stack configuration. Herein, the shield element and an antenna of the RFID inlay are only partially overlapping each other.

Systems and methods for providing security for authentication devicessuch as electronically readable cards or ID badges with embedded RFID chips or NFC capabilitymay include an envelope or pocket-like case for carrying an electronically readable card, having an electrically conductive, non-opaque sleeve that can be moved to cover or expose the electronically readable card and that prevents information on the card from being electronically read when covered yet still allows the card to be seen when covered. In one or more embodiments, the sleeve may be a wire mesh that is flexible enough to be compressed to expose the card yet stiff (or rigid) enough to be extended to cover the card and that is transparent enough to allow reading visual information on the surface of the card when covering the card. Protection can be switched off by a mechanical switch that leaves the protection normally on.

A device for protecting one or more credit or charge cards from radio frequency scanning is disclosed. The device comprises a layered planar element sized for fitting within a card slot of a personal carrying accessory, wherein the planar element is composed of an uncharged, conductive material and wherein the planar element inhibits the transmission of radio frequency signals. The planar element also has a front and back plastic layer for the addition of other items. In particular, a reading lens and a push button activated light source are integrated with the front plastic layer for easing reading of small text and in low lighting conditions.

A novel multilayer card has embedded therein a faraday cage layer which protects a RFID or ICC chip that is also embedded in the card. The antenna for the RFID or ICC device has an actuable switch which can alternatively open and close the antenna circuit enabling the user to disable or enable the RFID or ICC chip. The card can also be converted into a hollow prism with the faraday cage layer nearer the outer surface of the prism so that the RFID or ICC chip can only be accessed from the prism interior. Private or sensitive information stored on the interior surface is also protected from unauthorized access.

A communication control method for a communication device includes (i) blocking communication of the communication device with a wireless device by causing a metal-containing member to be close to the communication antenna among a plurality of antennas, or by covering at least a part of the communication antenna with the metal-containing member; (ii) charging a capacitor by the communication device, based on energy acquired by an energy acquisition antenna of the communication device, regardless of whether the communication device can communicate with the wireless device, to keep a voltage of the capacitor equal to or higher than the predetermined value; and (iii) resuming communication of the communication device with the wireless device when the metal-containing member is stopped from being close to the communication antenna or when at least a part of the communication antenna is stopped from being covered with the metal-containing member.