Apparatus and method for hardware metering using memory-type camouflaged cell

An apparatus for hardware metering using a memory-type camouflaged cell, comprising:

• memory including multiple memory cells, at least one of which is a camouflaged memory cell in which a key is hidden by a designer in advance, the at least one camouflaged memory cell being identified by the designer only;
• and
• a controller configured to control whether to block supply of power to the memory,
• wherein the controller is further configured to perform:
• reading the hidden key from a key location among the multiple memory cells of the memory based on key location information when a key and the key location information are input from an outside;
• determining whether the key input from the outside is identical to the key read from the memory;
• setting an authentic flag based on a determination result;
• and
• performing control based on the set authentic flag such that the memory operates normally or such that the supply of power is blocked and the memory is unavailable.

An apparatus for hardware metering using a memory-type camouflaged cell, comprising:

• memory including multiple memory cells, at least one of which is a camouflaged memory cell in which a key is hidden by a designer in advance, the at least one camouflaged memory cell being identified by the designer only and a memory cell in which a message is stored;
• and
• a controller configured to control whether to block supply of power to the memory,
• wherein the controller is further configured to perform:
• reading the message from the memory based on a message location stored in the controller in advance and outputting the message when a key location is input from an outside;
• performing a Hash Message Authentication Code (HMAC) operation based on the message and on the key that is read from the memory based on the key location input from the outside;
• in response to an outer HMAC input from the outside, determining whether the outer HMAC is identical to an inner HMAC;
• setting an authentic flag based on a determination result;
• and
• performing control based on the set authentic flag such that the memory operates normally or such that the supply of power is blocked and the memory is unavailable.