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TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

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Communication Reader-Host Rev. 1.2 February 1999<br />

3.7.13 HT1_Mutual_Authent<br />

Carries out the full authentication procedure between the transponder and the read/write device.<br />

After this mutual authentication you are allowed to edit areas which can only be accessed in<br />

Crypto Mode.<br />

Using -keyinfo- you can choose between Key/Logdata Set A and B.<br />

Use a Plain command (that is still encrypted), HFReset or GetSnr (resets the already selected<br />

transponder) to exit this mode.<br />

C-Function: void HT1_Mutual_Authent (BYTE_T keyinfo);<br />

Header-File: Hitag1.H<br />

Serial protocol:<br />

HOST - READ/WRITE DEVICE<br />

0x03 'A' keyinfo BCC<br />

keyinfo:<br />

0x00 ... Key/Logdata Set A<br />

0x01 ... Key/Logdata Set B<br />

READ/WRITE DEVICE - HOST<br />

0x02 Status BCC<br />

Status: 0 ... no error<br />

-1 ... SERIAL ERROR<br />

-7 ... AUTHENTICATION ERROR<br />

Protokoll HTRM801 V1.2/C Page 28 (107)

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