US 2007/0165860 A1Published application

Method for issuing ic card storing encryption key information

OwnerFukio Handa, Yoshihiro Yana +2inventors

InventorsFukio Handa, Yoshihiro Yana, Takayuki Chikada, Syouzou Niwata

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Abstract

It is possible to issue an IC card storing unique encryption key information in such a manner that re-issuing is enabled and sufficient security can be assured. An IC card provider X delivers an IC card having a group code G(A) to a company A and an IC card having a group code G(B) to a company B. When a company staff α inputs a unique personal code P(α) and performs initialization, in the IC card, calculation is performed according to a predetermined algorithm using the P(α) and G(A). Data uniquely determined by the calculation is stored as encryption key information K(α) in the IC card. Even if the company staff α loses the IC card, it is possible to obtain the IC card having the same encryption key information K(α) as before by performing initialization again by using the IC card delivered by the IC card provider X.

Claims10

Dependent claims

A method for issuing a plurality of IC cards, each storing unique encryption key information, to specific individuals belonging to specific groups, the method for issuing IC cards storing encryption key information comprising the steps of:

preparing IC cards (100), each having a CPU (120), a memory (110), and an I/O unit (130), which performs transaction of information with respect to the exterior, and having stored in the memory, a key information generating program, which, by performing a calculation process based on a predetermined algorithm using at least two pieces of data, generates encryption key information that is uniquely determined by the two pieces of data (S1);
defining a secret group code (G) for each group, and writing the secret group code, defined for a group to which an individual, to whom an IC card is to be issued, belongs, into the memory of each prepared IC card (S2);
writing a predetermined secret personal code (P), designated by an individual to whom an IC card is to be issued, into the memory of each prepared IC card (S3);
and
making the CPU execute the key information generating program to generate encryption key information (K) using at least the two pieces of data of the secret group code and the secret personal code and store this encryption key information into the memory of each IC card.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/579,080Filed 2 May 2005
Priority: JP 2004-1371926 May 2004
Published: 19 Jul 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G07F 7/1008
Together with a coded signal , e.g. in the form of personal identification information, like personal identification number [PIN] or biometric…
G06Q 20/341
Using cards, e.g. integrated circuit [IC] cards or magnetic cards: active cards, i.e. cards including their own processing means, e.g. including…
G06Q 20/355
Using cards, e.g. integrated circuit [IC] cards or magnetic cards: personalisation of cards for use
G06Q 20/40975
Using mutual authentication between devices and transaction partners: using encryption therefor