Encrypted metal keyboard for password input of kiosk and restaurant ordering machine

Product name:Metal encryption keyboard

Product model:GZ-B005015-001

Product specification:87.5*91.5mm

1 Overview

This product is a metal password keyboard with 4 PSAM card functions. With DES and 3DES functions,

Support PSAM card complying with ISO7816, t = 0 and T = 1 protocol

2 performance index

2.1 communication parameters

Standard RS232 serial communication interface. 1 start bit, 1 stop bit.

Optional communication rate: 9600 bps.

Optional data format: n, 8, 1

2.2 specification and operation speed

In line with the specifications of the people's Bank of China.

Encryption and decryption speed < 1 second.

2.3 electrical performance

Power supply: DC + 5V DC power supply.

Power consumption: below 1W in working state and below 200MW in non working state.

Power failure key keeping: when the power supply is cut off instantaneously and for a long time, the memory data will not be lost.

2.4 mechanical properties

Key life: over 200000 times.

Key pressure: 3N (n).

Key stroke: 0.45mm.

Key material: stainless steel.

Panel material: stainless steel.

Key surface characters: laser lettering and strong paint.

2.5 environmental adaptability

Working temperature: - 10 ℃ ~ + 40 ℃ relative humidity: 40-90% (under normal conditions).

Storage temperature: - 30 ℃ ~ + 55 ℃ relative humidity: 20-95% (no condensation).

Atmospheric pressure: 60-106 kPa.

2.6 reliability

MTBF >20000h,MTTR<30min.

3 keyboard commands

Command format: 02h + < ln > + < CMD > + < data > + < BCC >

Return format: 02h + < ln > + < st > + < data > + < BCC >

Ln -- represents the number of bytes of CMD and data or ST and data.

CMD -- command keyword.

Data -- data information exchanged.

BCC -- byte exclusive or checksum from ln to data.

ST - explain as follows:

04H - command executed successfully

15h - wrong command parameter

80h -- timeout error

A4H -- the command can be executed successfully, but the master key is invalid

B5h -- invalid command and master key

E0h -- invalid command

FXH - error in self check:

X=0 CPU wrong

X=1 SRAM wrong

X = 2 keyboard has short circuit error

X = 3 serial level error

X = 4 CPU card error

X = 6 master key failure

X = 7 misc. Error

3.1 take the product version number and other parameters.

Command: 02h + 01h + 30h + < BCC >

Return: 02h + < ln > + < st > + < data > + < BCC >. St may be 04H, 15h, e0h, F0H. F0H indicates that e2rom chip is not installed.

Description: data = ver + Sn + rechang, where VER is the version number of 16 bytes (ASCII code), the first 4 bytes (BCD) of Sn is the production serial number, the last 4 bytes are all "00" (if there is a cryptographic algorithm chip, it is its number), and rechang is the charging time of 2 bytes (hardware support required).

3.2 program reset self check, key not cleared.

Command: 02h + 01h + 31h + < BCC > (02h + 02h + 31h + 38h + BCC can reinitialize 8 master keys in the keyboard to 38h)

Description: after the keyboard self check, if the master key is valid (16 master keys are verified by BCC), the buzzer will ring once, and the self check status is in St.

Return: 02h + 01h + < st > + < BCC >. St may be 04H, 15h, e0h, FXH.

3.3 install the master key (except for Sam card mode).

Command: 02h + 0ah + 32H + < m > + < TMK > + < BCC >

Description: the master key number m is 1 byte (00-0fh), and the 16 master keys TMK are 8 / 16 / 16 bytes (corresponding to DES, 3DES and chip modes respectively). If the master key number m is 1 byte (41-4fh), it needs to be decrypted and saved with the original master key of the same number.

Return: 02h + 01h + < st > + < BCC >. St may be 04H, 15h, A4H, b5h, C4H, d5h, E0. 04H indicates that the master key has been loaded.

3.4 install the work key (except for Sam card mode).

Command: 02h + 0Bh + 33H + < m > + < n > + < WP > + < BCC > ciphertext WP is 8 bytes

Description: the working key ciphertext WP is 8 / 16 / 24 bytes (corresponding to DES, 3DES and chip modes respectively).

Return: 02h + 01h + < st > + < BCC >. St may be 04H, 15h, A4H, b5h, C4H, d5h, e0h.

Note: the working key No. n (00-03h) is used to encrypt the working key WP with the master key No. m (DES / 3DES). After the password keyboard is decrypted, the WP working key area is saved for the encryption and decryption command of the following keyboard data.

3.5 card number or account number installed (for anxix9.8 encryption)

Command: 02h + 0dh + 34h + < card-no > + < BCC >

Description: card number or account card-no is a 12 byte ASCII numeric code.

Return: 02h + 01h + < st > + < BCC >. St may be 04H, 15h, C4H, d5h, e0h.

3.6 start password keyboard encryption

Command: 02h + 06h + 35h + < pin-l + < disp-md > + < jm-md > + < ts-md > + < timeout > + < BCC >

Description: the following table

Function: turn on the keyboard automatically, and allow key input after prompt. When input, it is required to judge the length of input password compared with pin-l, if it is less than pin-l

But if there is a confirmation key, or the pin-l does not need a confirmation key, it needs to be supplemented with 00 / FFH to an integer multiple of 8 bytes in length. According to the encryption mode, whether the operation of card-no and pin's identity information is needed (according to ansix9.8 or ISO 9564 or ibm3624 during pin block operation), then the password encryption operation is carried out, and finally the returned data is saved in the buffer until the password command is obtained. If you exit after timeout, there will be no ciphertext in the returned state only.

Return: 02h + 01h + < st > + < BCC >. St may be 04H, 15h, A4H, b5h, C4H, d5h, e0h.

3.7 data encryption (except for Sam card mode).

Command: 02h + 09 + 36h + < string > + < BCC >

Description: encrypts the 8-byte plaintext string with the current working key (DES / 3DES). Perform password encryption and return ciphertext data.

Return: 02h + 09h + < st > + < ciphertext string > + < BCC > St may be 04H, 15h, A4H, b5h, C4H, d5h, e0h.

3.8 data decryption (except for Sam card mode).

Command: 02h + 9 + 37h + < ciphertext string > + < BCC >

Description: decrypts the 8-byte ciphertext string with the current working key (DES / 3DES). Perform password decryption operation and return clear text data.

Return: 02h + 09h + < st > + < plain text string > + < BCC >. St may be 04H, 15h, A4H, b5h, C4H, d5h, e0h.

3.9 take product serial number string

Command: 02h + 01h + 38h + < BCC >

Return: 02h + 09h + < st > + < serial number string > + < BCC >. St may be 04H, 15h, e0h.

Note: the sequence number string is 8 bytes. There is one byte for year (two bits for BCD code), one byte for month (two bits for BCD code), and two bytes for production serial number (four bits for BCD code). The last four bytes are four 00h when there is no cipher algorithm chip.

3.10 display string

Command: 02h + < ln > + 39H + < string > + < BCC >.

Description: not supported.

Return: 02h + 01h + < st > + < BCC >. St may be 04H, 15h, e0h.

Note: the Chinese character code is encoded according to the password keyboard font, and the character number must be displayed by the password keyboard. If no string part of the table clears the display.

3.11 Data Mac operation (except Sam card mode)

Command: 02h + 09h + 41h + < string > + < BCC >

Description: use the current MAC working key (DES / 3DES) to calculate the 8-byte plaintext string. Returns MAC string data.

Return: 02h + 09h + st + < MAC string > + < BCC > St may be 04H, 15h, A4H, b5h, C4H, d5h, e0h.

3.12 access the password in the keyboard (except for Sam card mode)

Command: 02h + 01h + 42h + < BCC >

Description: returns the previously encrypted ciphertext in the buffer, and turns off the password state to restore the original state.

Return: 02h + 0eh + < st > + < ciphertext > + < CN > + < Sn > + < BCC >. St may be 04H, 15h, A4H, b5h, C4H, d5h, e0h.

Note: cn is a 1-byte operation sequence number, with one password added for each operation. SN is the unique serial number of the 4-byte cipher chip. Pin code only allows 0-9 number keys, delete key and confirm key. Pin code cannot be used for other function keys, but the original code will be sent out if the keyboard is opened before startup.

3.13 activate the work key (except for Sam card mode).

Command: 02h + 03h + 43h + < m > + < n > + < BCC >

Description: activate master key No. m with work key No. n as the current work key The current working key is specified for all password operations in the future. If the master key is used as the current working key, only the M (00-0fh) parameter is needed, which has nothing to do with n (00-03h). See B.16 command explanation.

Return: 02h + 01h + < st > + < BCC >. St may be 04H, 15h, A4H, b5h, C4H, d5h, e0h.

3.14 send back character

Command: 02h + 02h + 44h + < Chr > + < BCC >

Description: the password keyboard will immediately return the received characters.

Return: 02h + 02h + < st > + < Chr > + < BCC >. St may be 04H, 15h, C4H, d5h, E0. Chr represents an ASCII character.

3.15 send switch keyboard and key sound

Command: 02h + 02h + 45h + < CTL > + < BCC >

Description: turn on / off password keyboard, turn on / off key (BZ) sound. When the keyboard is open, once there is a pressure key, it will actively send out the key value code. If the button (BZ) sound is also on, it will sound when the button is pressed. There are also communication parameter settings.

Return: 02h + 01h + < st > + < BCC >. St may be 04H, 15h, C4H, d5h, E0.