Passcode or Face/Touch ID: does it change your Fifth Amendment position?

This page describes federal case law on whether compelling you to unlock your phone violates the Fifth Amendment’s protection against being made a witness against yourself. There is no single national answer. The circuits that have ruled on it disagree with each other, a Supreme Court petition on a related question is pending, and United States v. Smith, No. 24-1680 (2d Cir.) — a border cell-phone search case — was argued and remains undecided as of 8 September 2026; this site has not sourced a decision in it. Anything that tells you flatly “the law says” on this specific question is oversimplifying.

The Fifth Amendment says a person shall not “be compelled in any criminal case to be a witness against himself.” Whether unlocking a phone — with a memorized passcode, or with a fingerprint or face scan — counts as being a “witness” is the entire question these cases fight over.

In United States v. Payne (9th Cir. 2024), the court held that compelling the use of a biometric to unlock a device was not testimonial “because it required no cognitive exertion, placing it in the same category as a blood draw or a fingerprint taken at booking” — the compelled unlock merely gave officers access to a source of potential information, in the court’s reasoning, rather than forcing the person to communicate anything they knew.

The panel did not treat that as a blanket rule. Its own words: “Our opinion should not be read to extend to all instances where a biometric is used to unlock an electronic device.”

In United States v. Brown (D.C. Cir., decided Jan. 24, 2025), the court reversed a district court that had found a compelled cellphone unlock non-testimonial. The circuit’s own holding: “we hold that, in compelling Schwartz to unlock his cellphone, law enforcement violated the Fifth Amendment.” That is the appellate court’s ruling, not the district court’s — the district court had gone the other way, and was reversed.

State courts have also ruled on compelled passcode disclosure — Commonwealth v. Davis (Pa. 2019), Seo v. State (Ind. 2020), State v. Andrews (N.J. 2020) and State v. Valdez (Utah 2023) all address it, and a reader can look each one up by name. This site has not been able to fetch a quotable copy of any of the four opinions — official court sites returned errors or blocked automated access on every attempt — so none of them is cited here with a quote, and none of their holdings is characterized on this page. Treat the names as a starting point for your own research, not as this site’s account of what they decided.

This page is not legal advice about which unlock method to choose — the split above means the honest answer is “it depends where you are.” What the vendors themselves say is narrower and purely technical: Apple’s own documentation describes the encryption key protecting a locked iPhone’s most sensitive data as being discarded shortly after the device locks, and restored by entering the passcode or by unlocking with Face ID or Touch ID — the underlying data protection does not itself depend on which unlock method you use. GrapheneOS’s documentation separately describes its passphrase option as letting a user rely on a memorized diceware password rather than the phone’s secure element for throttling guesses. Neither of those vendor statements is about the Fifth Amendment; they describe what the device does, not what a court will hold. For the practical side of setting one up, see Passcode and software updates.