Secure PIN management of a user trusted device

US8423783B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Peter Buhler · Horgen, CH
• Harold D. Dykeman · Thalwil, CH
• Thomas Eirich · Wetzikon, CH
• Matthias Kaiserswerth · Richterswil, CH
• Thorsten Kramp · Adliswil, CH

Key dates

• Filing date: May 19, 2010
• Grant date: Apr 16, 2013
• Expiry date: Jul 12, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G07F7/1091
• WIPO field: Control
• WIPO sector: Instruments

Abstract

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.