Inside Secure M300 Manuel D’Utilisation

Page 28

DIVERSIFY KEY

Use

This function enables the user to calculate the result of key diversication with selected chip serial number.

The key diversified value is used for authentication and signature calculation while writing a secure chip.

This can have 2 uses :

- before an authentication (SELECT_PAGE or AUTHENTIFY command)

- to calculate the keys that will be written in a chip during a personalization phase (only working with a
dedicated personalization coupler)

Prototype

•

Command sent : 52h

•

Command type : ISO In

Parameters

P2 : Key number

01h - Debit Key Kd0

02h - Credit Key Kc0

03h - Debit Key Kd1

04h - Credit Key Kc1

.....

0Fh - Debit Key Kd7

10h - Credit key Kc7

Note : if the specified key is deactivated, the status bytes returned is 6Bh 00h.

Couplers - Reference Manuel V1.3

Host

80h

52h

00h

P2h

08h

Chip serial number

Coupler

52h

90h

00h