Patent ID: 7967215
Filing Date: 2011-06-28
Classification: H04L,H04W

Abstract:
1. A method for supporting multiple contactless applications using different security keys on a wireless smart device, the method comprising: at a wireless smart device configured to communicate with a wireless smart device reader, the wireless device including a plurality of contactless applications and a contactless application memory for use by the plurality of contactless applications: initializing a portion of the memory such that access to the portion of memory requires the use of a shared secret key known to the plurality of contactless applications; reserving the portion of memory for use by one of the plurality of contactless applications by using the shared secret key to set access privileges for the portion of memory such that access to the portion of memory requires the use of a application-specific secret key associated with the one application and not known to the other applications; accessing the reserved portion of memory using the application-specific secret key; and releasing the reserved portion of memory by using the application-specific secret key to set access privileges for the portion of memory such that access to the portion of memory requires the use of the shared secret key.