Researchers Create a Graphene-Based Physically Unclonable Function Recently, researchers have created a physically unclonable function using graphene transistors which may help the semiconductor industry deploy graphene into future products. What is a physically unclonable function, what did the researchers create, and how could it help security of the future? What is a physically unclonable function? A Physically Unclonable Function, or PUF for short, is a piece of hardware that produces a unique output in a predictable manner but whose construction cannot be replicated. For example, a manufacturer could create 10 identical PUF units, but each one would produce a different output. Furthermore, no matter how hard an attacker tries to recreate a PUF, even if they had access to the original drawings and designs, they would never be able to recreate the output of a specific PUF.