How to build a Hardware Lock?

[Shahriar]

Hi

I want to build a Parallel Hardware lock which can connects between Printer and PC Port.
I would appreciate it if I could use a serial EEPROM to Store some data.
Any schematic or Idea is appreciated in advance.

ThanX - Shahriar

[prateeksikka]

HI SHAHRIAR!
U HAVE DO BE PROFICIENT IN ONE OF THE PROGRAMMING LANGUAGES PREFERABLY      'C' FOR DEVELOPING THE LOCK!
YOU CAN STORE THE CODE IN AN EEPROM OR ANY MEMORY STICK(ON A USB)
AND INPORT THE CODE!FROM THE PORT ADDRESS(YOUR PROGRAMMING SKILL IS TESTED HERE) BE CAREFUL WHILE USING THE INPORT COMMAND.BE SURE WITH THE ADDRESSES AS THE PORTS ARE CONNECTRD TO MOTHERBOARD DIRECTLY.IF THIS CODE MATCHES EXIT THE LOOP WHICH CHECKS FOR THE CODE AND GIVE THE PRINTER COMMAND
PRATEEK