Title:
ACCESS METHOD TO DATA OF MICROPROCESSOR CARD
Document Type and Number:
Japanese Patent JP3239083
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To access at least part of data of a microprocessor card for a telephone set such as an SIM car for, e.g. a mobile communication equipment, having at least one accessible card number.
SOLUTION: An identification number (ADMc) is calculated, based on a card number and an encryption number 8 with an encryption algorithm 11, the result is transferred to a microprocessor card 1 and stored therein, the identification is compared with an identification number (ADM) generated by the similar method and access to the microprocessor card 1 is made enable, when the identification numbers are discriminated as being identical to each other.
Inventors:
Rossvita Bregger
Matthias Jungeman
Matthias Jungeman
Application Number:
JP12487897A
Publication Date:
December 17, 2001
Filing Date:
April 28, 1997
Export Citation:
Assignee:
Mannesmann Actien Gezelshaft
International Classes:
G06K17/00; G06F21/34; G06F21/44; H04M1/66; H04M1/67; H04W8/20; H04W12/06; H04W92/08; (IPC1-7): H04M1/67; G06F15/00; G06K17/00
Domestic Patent References:
| JP6501324A |
Attorney, Agent or Firm:
Nao Okuyama (3 others)
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