US 11,057,223 B2
Anti-counterfeit communication system
Meng-Yi Wu, Hsinchu County (TW); and Hsin-Ming Chen, Hsinchu (TW)
Assigned to eMemory Technology Inc., Hsin-Chu (TW)
Filed by eMemory Technology Inc., Hsin-Chu (TW)
Filed on Oct. 11, 2018, as Appl. No. 16/157,098.
Claims priority of provisional application 62/590,402, filed on Nov. 24, 2017.
Prior Publication US 2019/0165955 A1, May 30, 2019
Int. Cl. H04L 29/00 (2006.01); H04L 9/32 (2006.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01); H04L 29/06 (2006.01); G11C 11/56 (2006.01); G11C 16/04 (2006.01); H01L 27/11524 (2017.01); H01L 29/06 (2006.01); H01L 29/423 (2006.01); H01L 29/49 (2006.01); H02H 9/04 (2006.01)
CPC H04L 9/3278 (2013.01) [G11C 11/5621 (2013.01); G11C 16/0483 (2013.01); H01L 27/11524 (2013.01); H01L 29/0649 (2013.01); H01L 29/42328 (2013.01); H01L 29/4916 (2013.01); H02H 9/046 (2013.01); H04L 9/0866 (2013.01); H04L 9/0877 (2013.01); H04L 9/3073 (2013.01); H04L 63/062 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A communication system comprising:
a communication buffer comprising a physical unclonable function (PUF) device, and the communication buffer being configured to provide a first security key generated by the PUF device, 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 first mapping request to the communication buffer to ask for the first security key, manipulate transmission data with the first security key to generate first encrypted data, and transmit the first encrypted data to the communication buffer;
wherein the communication buffer is further configured to restore the transmission data from the first encrypted data according to the first security key.