tion of privacy.7 7 This characterization is consistent with how our circuit and others have articulated the doctrine. See, e.g., United States v. Villasenor. 608 F.3d 467. 471-72 (9th Cir.2010); United Stales v. Yang, 286 F.3d 940.945-46 (7th Cir.2002); United States v. Hyde, 37 F.3d 116. 120 n. 2 (3d