| 摘要 |
This invention concerns an integrated circuit (IC) device, such as smart cards, electronic wallets, PC cards, and the like, and various methods for modifying data values held by the device. The IC device has a memory and a processor. The IC device maintains an identity authentication table in the memory to hold an arbitrary number of identities. The identity authentication table correlates identities with authentication protocols, so that different protocols can be used to authenticate associated identities. The IC device also maintains an authentication vector in memory. The authentication vector tracks identities in the identity authentication table that are currently authenticated by the IC device. The device maintains a mask library having a plurality of masks that can be selected to modify specific data values that are held by the device. The IC device further maintains authorization tables in the memory and in association with particular files used in transactions. Each authorization table defines authorization for a particular transaction as a Boolean expression of the identities listed in the identity authentication table.
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