{HEAD ~ A protected memory circuit} for use with an electronic data system includes a memory element such as {TAIL ~ a shift register}, and memory control or lock means to selectively control enablement of the memory element for read/write operations 
{ HEAD ~ A protected memory circuit } for use with an electronic data system includes a memory element such as { TAIL ~ a shift register } , and memory control or lock means to selectively control enablement of the memory element for read / write operations
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH