Secure pin management of a user trusted device

摘要

A mechanism is provided for secure PIN management of a user trusted device. A user trusted device detects a memory card coupled to the user trusted device. The user trusted device receives user input of an external PIN (ext_PIN). The user trusted device identifies a key (K) associated with the external PIN, wherein the key is stored in the persistent memory. The user trusted device computes a card PIN (card_PIN) using a function (f) and the key as stored on the persistent memory, wherein the card PIN is computed using the following equation: card_PIN=f(K, ext_PIN). The user trusted device unlocks the memory card using the card PIN, thereby forming an unlocked memory card.