Anti-counterfeit communication system

A communication system comprising:

• a communication buffer comprising a physical unclonable function (PUF) device, and the communication buffer being configured to provide a security key generated by the PUF device, and manipulate transmission data with the security key to generate encrypted data, wherein the PUF device comprises a plurality of PUF units each comprising:
• a first select transistor having a first terminal coupled to a first bit line, a second terminal, and a control terminal coupled to a word line;
• a first anti-fuse transistor having a first terminal coupled to the second terminal of the first select transistor, a second terminal, and a control terminal coupled to an anti-fuse control line;
• a second anti-fuse transistor having a first terminal, a second terminal, and a control terminal coupled to the anti-fuse control line;
• and
• a second select transistor having a first terminal coupled to a second bit line, a second terminal coupled to the first terminal of the second anti-fuse transistor, and a control terminal coupled to the word line;
• wherein during an enroll operation of the PUF unit, the anti-fuse control line is at a program voltage;
• and
• a first communication terminal coupled to the communication buffer, and configured to transmit a mapping request to the communication buffer to ask for the security key, restore the transmission data from the encrypted data according to the security key, and perform a corresponding function according to the transmission data.

A method for operating a communication system, the communication system comprising a communication buffer and a first communication terminal, and the method comprising:

• the first communication terminal transmitting a first mapping request to the communication buffer;
• the communication buffer providing a first security key generated by a PUF device in the communication buffer to the first communication terminal;
• the first communication terminal manipulating transmission data with the first security key to generate first encrypted data;
• the first communication terminal transmitting the first encrypted data to the communication buffer;
• and
• the communication buffer restoring the transmission data according to the first encrypted data and the first security key;
• and
• wherein the communication system further comprises a second communication terminal, and the method further comprises:
• the second communication terminal transmitting a second mapping request to the communication buffer;
• the communication buffer providing a second security key generated by the PUF device to the second communication terminal;
• the communication buffer manipulating the transmission data with the second security key to generate second encrypted data;
• and
• the second communication terminal restoring the second encrypted data to the transmission data according to the second security key.