Is it Checksum or What?

[ucokseparoh]

Can anyone help me understand this thing please..

So.. i'm playing up with a Mazda 3 dump (DST 4D) and observe the before and after data. I'm adding 2 keys to the dump by using that EH2 transponder.

First key data :

Pg1 03
Pg2 00
Pg3 12 34 56 01
Pg4 34 56 78 AB CD

Second Key Data :

Pg1 03
Pg2 00
Pg3 23 45 67 01
Pg4 45 67 89 AB CD

I can see both key data in the after dump actually.. it's in line 0E0 x 00-07. What i don't understand is this value in line 0E0 x 06-07 (8B 06 and 71 2E).

What is this? Where they come from (as it obviously they are not my key data)?

Can anyone with knowledge explain this to me please? Thanks..

Best regards..

Below is the pict of before and after file (with key one added and key 2 added) consecutively..

438458

438459

438460

[ucokseparoh]

I know.. Tango or x100 or SKP or any other machine will do this easily. But what's the point of doing something yet we don't have a proper understanding on what we do? That's why i ask..