System and method for security using a sibling smart card

摘要

A system and method for realizing specific security features for a mobile device that may store sensitive and private data by providing secured communications to a paired remote device. In this respect, both the mobile device (which may be a mobile phone, for example) and the paired remote device (which may be a keychain, for example) include a SIM card that may have identification data stored therein. Once paired, the two devices may communicate encrypted security messages back and forth in order to implement various security measures to protect data and wireless communications. Such messages may be generated from initial information known only to each respective device such as a randomly generated offset number and a common time reference.

主权项

1. A device, comprising:
a first subscriber identity module having a first time-synchronized key; a memory configured to store data; a communications module coupled to the memory and configured to detect a remote device; and a controller coupled to the memory and configured to:
operate the communications module to establish a pairing relationship with the remote device;determine a common time reference as a function of an initial time for said pairing and a random value;calculate said first time-synchronized key as a function of the common time reference;operate the communications module to transfer the random value to the remote device, said remote device operable to calculate a second time-synchronized key using the transferred random value; anddetermine if the remote device includes a second subscriber identity module having the second time-synchronized key that matches the first time-synchronized key of the first subscriber identity module.