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Secure MICR Printer User’s Guide © Source Technologies
September 2005
25 All Rights Reserved
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 ($) is the command terminator and is required.
Set AES Decryption Key Command &%STSETAESKEY<32 Hex Characters>$
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 &%STDON$
Turn AES Decryption ON &%STAON$
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 &%STDOFF$
Turn AES Decryption OFF &%STAOFF$
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.
MFP Copy Defeat Commands
A Secure MICR printer with the Multi Function Printer (MFP) feature can scan and copy
documents. This allows the end users to copy MICR documents with MICR toner. The
Copy Defeat command will block the copy function when a MICR toner cartridge is
installed, but allow the copy function with standard toner.
MFP MICR Copy Defeat ON &%STMCDON$
MFP MICR Copy Defeat OFF &%STMCDOFF$