Thai National ID Card Specification

1. System Overview

• Standards: ISO/IEC 7816-4
• Encoding: TIS-620 (Thai Character Set)
• Crypto: None for basic data reading (Plaintext access after selection)
• Protocol: T=0 / T=1 (Contact)

2. Application Identifiers (AID)

Application	AID (Hex)	Description
Thai ID App	A0 00 00 00 54 48 00 01	Main ID Application

3. APDU Command Reference

CLA: 80 (Proprietary) for Reading, 00 (ISO) for Selection.

Command	INS	P1	P2	Data	Le	Description
SELECT	A4	04	00	[AID]	-	Select Application
READ BIN	B0	OfsH	OfsL	-	Len	Read Data from fixed offsets
GET RESP	C0	00	00	-	Len	Get Response (if SW=61xx)

4. Data Offsets (Virtual File Structure)

The Thai ID card acts like a large binary file where different data fields are located at specific offsets. Requires SELECT AID first.

Field Name	Offset (Hex)	Length (Bytes)	Description
Citizen ID	00 04	13	13-digit National ID Number (ASCII)
Full Name (Thai)	00 11	100	Thai Name (TIS-620)
Full Name (En)	00 75	100	English Name (ASCII)
Date of Birth	00 D9	8	YYYYMMDD (ASCII, often Buddhist Era?)
Gender	00 E1	1	'1'=Male, '2'=Female
Issuer	00 F6	100	Issuing Authority (Thai)
Issue Date	01 67	8	YYYYMMDD
Expiry Date	01 6F	8	YYYYMMDD
Address	15 79	100	Address (Thai)
Photo	xxxx	var	Split into multiple chunks (requires chaining)

5. Reading Flow

1. SELECT Thai ID App (00 A4 04 00 08 A0 00 00 00 54 48 00 01).
   • Check SW 9000.
2. READ BINARY specific offsets.
   • Example (Read CID): 80 B0 00 04 02 00 0D.
   • Note: The 02 in P2 (or Lc field in some drivers) might be specific to certain readers/cards, but standard ISO READ BINARY uses P1/P2 as offset.
   • Correction: Some sources say command structure is 80 B0 P1 P2 02 00 Le. The 02 00 bytes are peculiar to Thai ID structure.
3. Decode TIS-620 bytes to String.