Mfp Copy Defeat Commands - IBM Infoprint 1572 MICR 50 User Manual

Secure micr printer

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Table Of Contents

Table of Contents

bytes are 0 through 9, A through F. Alpha key characters can be upper or lower case.

Command characters must be upper case. An example of a valid key command -

&%STSETDESKEY5f00FF7E3DA938eb$ The key value remains in the printer until

another key command is received. Printer power cycles and printer reset commands do

not affect the key value.

The dollar sign ($) is the command terminator and is required.

Set AES Decryption Key Command

The command also requires a MICR Password Command be sent prior to the Key

Command.

The key data is similar to DES, but is twice in length with 32 Hex character format

representing the 16 byte or 128-bit key value.

Turn DES Decryption ON

Turn AES Decryption ON

All data following the $ command terminator will be decrypted using the current key value

stored in the printer and the DES or AES algorithm. Decryption continues until a Decryption

OFF command is received, a printer panel reset occurs, or printer power is cycled. Printer

software language resets do not stop decryption.

Turn DES Decryption OFF

Turn AES Decryption OFF

The OFF command resides within the encrypted data, and must also be encrypted. The

OFF occurs after an 8-byte block (DES) or 16-byte block (AES) is received and decrypted.

The last block containing the OFF should either have the command right justified or padded

out to the block boundary. Any padding bytes after the $ command terminator will be

discarded.