title: Self-Assembled Resonance Energy Transfer Keys for Secure Communication over Classical Channels.
abstract: Modern authentication and communication protocols increasingly use physical keys in lieu of conventional software-based keys for security. This shift is primarily driven by the ability to derive a unique, unforgeable signature from a physical key. The sole demonstration of an unforgeable key, thus far, has been through quantum key distribution, which suffers from limited communication distances and expensive infrastructure requirements. Here, we show a method for creating unclonable keys by molecular self-assembly of resonance energy transfer (RET) devices. It is infeasible to clone the RET-key due to the inability to characterize the key using current technology, the large number of input-output combinations per key, and the variation of the key's response with time. However, the manufacturer can produce multiple identical devices, which enables inexpensive, secure authentication and communication over classical channels, and thus any distance. Through a detailed experimental survey of the nanoscale keys, we demonstrate that legitimate users are successfully authenticated 99.48% of the time and the false-positives are only 0.39%, over two attempts. We estimate that a legitimate user would have a computational advantage of more than 10(340) years over an attacker. Our method enables the discovery of physical key based multiparty authentication and communication schemes that are both practical and possess unprecedented security.
authors.affiliation: Department of Electrical and Computer Engineering, Duke University , 130 Hudson Hall, Durham, North Carolina 27708, United States.
authors.forename: Vishwa
authors.initials: V
authors.lastname: Nellore
authors.affiliation: Department of Electrical Engineering, Harvard University , 33 Oxford Street, Room 308, Cambridge, Massachusetts 02138, United States.
authors.forename: Sam
authors.initials: S
authors.lastname: Xi
authors.affiliation: Department of Electrical and Computer Engineering, Duke University , 130 Hudson Hall, Durham, North Carolina 27708, United States.
authors.forename: Chris
authors.initials: C
authors.lastname: Dwyer
keywords: DNA self-assembly; Förster resonance energy transfer (FRET); authentication; communication; nanoscale computing; unclonable device