Security token for mobile near field communication transactions

A mobile device comprising:

• a housing;
• an interface;
• a mobile processor;
• a security token in communication with the mobile processor via the interface, the security token comprising
• a near field communications transceiver,
• a token memory that stores transaction information and a token logic that, when executed, causes the security token to enable a point-of-sale terminal to access the transaction information based on a determination that no restriction is present, wherein the security token is removably coupled to a housing of the mobile device;
• and
• a mobile memory that stores instructions that, when executed by the mobile processor, causes the mobile processor to perform operations comprising programming the transaction information and the restriction on the security token, wherein the restriction is programmed on the mobile memory by the mobile device, and wherein the restriction comprises a point-of-sale identifier restriction.

A mobile device comprising:

• a mobile processor;
• a security token in communication with the mobile processor via an interface, the security token comprising
• a near field communications transceiver,
• a token memory that stores transaction information and a token logic that, when executed by the security token, enables a point-of-sale terminal to access the transaction information based on a determination that no restriction is present, wherein the security token is removably coupled to a housing of the mobile device;
• and
• a mobile memory that stores instructions that, when executed by the mobile processor, causes the mobile processor to program the transaction information and the restriction on the security token, wherein the restriction is programmed on the mobile memory by the mobile device, and wherein the restriction comprises a point-of-sale identifier restriction.