However, university research has shown that some delay-based PUF implementations are vulnerable to side channel attacks and improper implementation of PUF could introduce "backdoors" to an otherwise secure system.
However, university research has shown that some delay-based PUF implementations are vulnerable to side channel attacks and recommends that countermeasures be employed in the design to prevent this type of attack. Also, improper implementation of PUF could introduce "backdoors" to an otherwise secure system.