What is Physically unclonable function (PUF)?

Physically unclonable function (PUF) in the explanations

• A PUF reads out these differences to produce a value unique to each chip.

  Which describes a PUF (physically unclonable function)?

• With a PUF, the key is regenerated from the chip's physical properties each time it is used and is stored nowhere while power is off.

  What is the advantage of using a PUF for key storage?

• PUF values are set by manufacturing variation, but cells whose two options differ only slightly may read differently depending on temperature, voltage and noise.

  Why is error correction (such as helper data) combined with…

Questions that mention Physically unclonable function (PUF) (5)

1. Which describes a PUF (physically unclonable function)?
2. What is the advantage of using a PUF for key storage?
3. What property does an SRAM PUF exploit?
4. Why is error correction (such as helper data) combined with PUFs when deriving keys?
5. Which method is commonly used to store keys written into a chip?

Related terms

ECC (error-correcting code) eFuse Anti-rollback protection Cold boot attack Constant-time implementation Counterfeit chip Fault injection attack Hardware Trojan Kernel page-table isolation (KPTI) Measured boot