IDTech Augusta S

The Augusta S from IDTech is a secure Europay, MasterCard and Visa (EMV) chip and magnetic stripe reader (MSR). It is available in USB-HID or USB-KB configuration and uses common Human Interface Devices (HID) drivers. It supports Triple Data Encryption Standard (TDES) and Advanced Encryption Standard (AES) encryption of sensitive data with Derived Unique Key Per Transaction (DUKPT) key management. ID Tech provides .NET SDK, that facilitates interface between Windows Form applications, the device and payment application.

Magnetic Stripe Read

MSR data is returned as byte stream.

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

This data is parsed as follows:

Chars	Value	Description
1-2	02	Start of transmission (STX)
3-6	3201	Total Data Length (low, high byte) of card data. It is 0x0132 or 306 characters in decimal.
7-8	80	Card Encoding type (ISO/ABA, new format)
9-10	1F	Track status (Track 1 and Track 2 are good). Binary 0001 1111 is interpreted as follow: Bit 7: 0=reserved for future use Bit 6: 0=no “optional bytes length” is present Bit 5: 0=no Track 3 sampling data Bit 4: 1=Track 2 sampling data exists Bit 3: 1=Track 1 sampling data exists Bit 2: 1=Track 3 decode succeeded Bit 1: 1=Track 2 decode succeeded Bit 0: 1=Track 1 decode succeeded
11-12	4F	Unencrypted Track 1 length (79 bytes)
13-14	28	Unencrypted Track 2 length (40 bytes)
15-16	00	Unencrypted Track 3 length (not present)
17-18	A3	Clear/masked data sent status. Binary 1010 0011 is interpreted as follow: Bits 0,1,2: 011 = Track 1 and 2 are sent, Track 3 is not; Bit 3: 1 = fixed key, 0 = DUKPT key management; Bit 4: 0=TDES; 1, if AES Bit 5: 1=Chip present on card (Card service code starts with ‘2’ or ‘6’) Bit 6: 0= Data Encryption Key was used; 1, if PIN Encryption Key was used Bit 7: 1=Device Serial Number is included; 0= is not
19-20	9B	Encrypted data sent status. Binary 1001 1011 is interpreted as follows: Bits 0,1,2 = Track 1 and 2 are sent, Track 3 is not; Bits 3,4,5 = Track 1 and 2 dummy hashes are sent, Track 3 is not; Bit 6: 0 = session ID is not included Bit 7: 1=Key Sequence Number (KSN) is included
21-178	252A35...2A3F2A	Hex string of masked Track 1 data. As a text string: `%5413*****4111^DI TEST/CARD 04 ^****************************?`
179-258	3B3534...2A3F2A	Hex string of masked Track 2 data. As a text string: `;5413******4111=*****************?`
259-418	6F0F25...5E8729	Track 1 encrypted data. Total length is 80 bytes: real length 79 is rounded up to 8 bytes = 80 bytes. Decrypted Data in ASCII (1 zero byte padded at the end): `%B5413330089604111^DI TEST/CARD 04 ^25122010123409172 ?C`
419-498	1BAB6D...96531E	Track 2 encrypted data. Total length is 40 bytes: real length 40 is rounded up to 8 bytes = 40 bytes. Decrypted Data in ASCII (no zero bytes padded at the end): `;5413330089604111=25122010123409172000?6`
499-538	000000...000000	Track 1 dummy hash data (20 zero bytes)
539-578	000000...000000	Track 2 dummy hash data (20 zero bytes)
579-598	373136...303130	10 bytes of device serial number. As a text string: 716T494010
599-618	629949...000002	10 bytes of Key Sequence Number (KSN)
619-620	2B	CheckLRC - one byte Exclusive-OR sum calculated for all data bytes
621-622	23	CheckSum - one byte Sum calculated for all data bytes
623-624	03	End of transmission (ETX)

EMV Data

Transaction data from chip-card interactions (EMV data) is returned primarily as tag length value (TLV) triplets.

ID Tech transaction data consists of mix industry-standard EMV tags and proprietary ID Tech tags. Tag value is encoded as follows:

Byte 1: First (and possibly the only) value of the Tag. If the bottom 5 bits are ON, then next byte is also part of the tag. In other words:
(1stByte & 0x1F == 0x1F) // TRUE means more tag bytes follow
Byte 2..n (if necessary): If the most significant bit is ON, then next byte is also part of the tag. In other words:
(Byte & 0x80 == 0x80) // TRUE means more tag bytes follow

The top bits of the tag length byte have special meaning:

If the most significant bit of the length byte is OFF, then byte represent the byte length of data to follow. Otherwise, if the bit is ON, then the lower nibble specifies how many following bytes specifies the length of the data to follow. For example, if the length byte is 84, the most significant bit is 1, the lower nibble is 4. Thus, the number of data length bytes is 4.
If bit 7 is set, bits 5 and 6 of the tag length byte are used in a special way:
- Bit 6 will be set, if data is encrypted.
- Bit 5 will be set, if data is masked (i.e. track data)

The following table lists IDTech proprietary tags for encrypted and/or masked data:

Tag	Data
5A	Masked or encrypted packed PAN
56	Masked or encrypted packed Track 1 data
57	Masked or encrypted packed Track 2 data
5F20	Hex string of cardholder name
5F24	Packed card expiration Date (YYMMDD)
5F30	Card service code
9F1F	Hex string of encrypted Track 1 discretionary data
9F20	Hex string of encrypted Track 2 discretionary data
9F6B	Packed encrypted Track 2 data
FFEE13	Packed encrypted Track 1 data
FFEE14	Packed encrypted Track 2 data
DFEE12	10 bytes hex string of Key Sequence Number (KSN)
DFEE26	Encryption Status Info

Example

02b70006001000dfee26022000dfee120a6299490000000000000657a1124147cccccccc6611d2007201cccccccccccc57c118e8e8b8c318cee547e6bf4529d23056c74bd49b8451a10daa5aa1084147cccccccc66115ac11073314e66ec187ad0b27bd6006efa361e5f3401015f20134b415341544b494e2f414c4558414e444552205f24032007319f20005f25031607015f2d02656e500b56495341204352454449544f07a00000000310108407a0000000031010dfee230020d003

This data is parsed as follows:

Chars	Value	Description
1-2	02	Start of transmission (STX)
3-14	b70006001000	Ignore.
15-20	dfee26	Encryption Status Info Tag
21-22	02	The tag data length (two byes)
23-26	2000	The tag data
27-32	dfee12	KSN tag
33-34	0a	The tag data length (0x0A or 10 decimal)
35-54	629949...000006	KSN value
55-56	57	Track 2 data tag
57-58	a1	The tag length. Bit 7 is 1, bit 6 is 0, bit 5 is 1, lower nibble is 1. Next byte represents byte length of masked data to follow.
59-60	12	Actual data length (Hex 12 or 18 bytes)
61-96	4147cc...cccccc	Masked packed Track 2 data. ‘C’ is masking character
97-98	57	Track 2 data tag
99-100	c1	The tag length. Bit 7 is 1, bit 6 is 1, bit 5 is 0, lower nibble is 1. Next byte represents byte length of encrypted data to follow.
101-102	18	Actual data length of tags data. Hex 18 is 24 decimal.
103-150	e8e8b8...a10daa	Encrypted Track 2. If decrypted, it gives as the following string: `57124147098628916611d200720116205903901f00000000` Data represents tag 57 with length byte 12 (18 bytes). Data starts with byte 41: `4147098628916611d200720116205903901f` Replacing ‘d’ with ‘=’ and removing ‘f’: `4147098628916611=200720116205903901`
151-152	5a	Card PAN tag
153-154	a1	The tag length. Bit 7 is 1, bit 6 is 0, bit 5 is 1, lower nibble is 1 Next byte represents byte length of masked data to follow
155-156	08	Byte length of masked PAN data
157-172	4147cc...cc6611	Masked packed PAN data. ‘C’ is the masking character
173-174	5a	Card PAN tag
175-176	c1	The tag length. Bit 7 is 1, bit 6 is 1, bit 5 is 0, lower nibble is 1. Next byte represents byte length of encrypted data to follow.
177-178	10	Actual data length of tags data. Hex 10 is 16 decimal.
179-210	73314e...fa361e	Encrypted PAN. If decrypted, it gives as the following string: `5a084147098628916611000000000000` Data represents tag 57 with length byte 08 (8 bytes). Data starts with byte 41: `4147098628916611`
211-214	5f34	EMV tag – Application PAN Sequence Number
215-216	01	The tag length
217-218	01	The tag value
219-222	5f20	EMV tag – Cardholder Name
223-224	13	The tag length
225-262	4b4153...455220	The tag value: KASATKIN/ALEXANDER
263-266	5f24	EMV tag – Application Expiration Date
267-268	03	The tag length
269-274	200731	The tag value
275-278	9f20	EMV tag – Track 2 discretionary data
279-280	00	The tag length. No value follows
281-284	5f25	EMV tag – Application Effective Date
285-286	03	The tag length
287-292	160701	The tag value
293-296	5f2d	EMV tag – Language Preference
297-298	02	The tag length
299-302	656e	The tag value
303-304	50	EMV tag – Application Label
305-306	0b	The tag length
307-328	564953...444954	The tag value (VISA CREDIT)
329-330	4f	EMV tag – Application Identifier
331-332	07	The tag length
333-346	a00000...031010	The tag value
347-348	84	EMV tag – Dedicated File Name
349-350	07	The tag length
351-364	a00000...031010	The tag value
365-372	dfee2300	Ignore
373-374	20	CheckLRC - one byte Exclusive-OR sum calculated for all data bytes
375-376	d0	CheckSum - one byte Sum calculated for all data bytes
377-378	03	End of transmission (ETX)