Method and apparatus for protecting computer software utilizing an active coded hardware device

摘要: A method and apparatus are provided for protecting computer software using an active coded hardware which is adapted to be connected by interface connector a communications port of computer. The directed program in small section the code interrogates periodically determine if device present connected. has permanently established preset on presettable counter circuit transmitted when interrogated. If interrogated correct returned through computer, permitted continue insuring that properly protected at all times. with its particular circuitry sealed epoxy as deterrent against tampering. In order violate it would necessary construct duplicate run second copy software. Since containing electrical logical elements degree duplicating function without benefit diagrams will greater than itself. may used alone or permit daisy-chaining allowing 2, 3 even entire family other their own individual codes operate simultaneously same time peripherals remain port. variety logic added basic configuration increase difficulty violating system.