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2015 ; 5
(ä): 16456
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Using Quantum Confinement to Uniquely Identify Devices
#MMPMID26553435
Roberts J
; Bagci IE
; Zawawi MA
; Sexton J
; Hulbert N
; Noori YJ
; Young MP
; Woodhead CS
; Missous M
; Migliorato MA
; Roedig U
; Young RJ
Sci Rep
2015[Nov]; 5
(ä): 16456
PMID26553435
show ga
Modern technology unintentionally provides resources that enable the trust of
everyday interactions to be undermined. Some authentication schemes address this
issue using devices that give a unique output in response to a challenge. These
signatures are generated by hard-to-predict physical responses derived from
structural characteristics, which lend themselves to two different architectures,
known as unique objects (UNOs) and physically unclonable functions (PUFs). The
classical design of UNOs and PUFs limits their size and, in some cases, their
security. Here we show that quantum confinement lends itself to the provision of
unique identities at the nanoscale, by using fluctuations in tunnelling
measurements through quantum wells in resonant tunnelling diodes (RTDs). This
provides an uncomplicated measurement of identity without conventional resource
limitations whilst providing robust security. The confined energy levels are
highly sensitive to the specific nanostructure within each RTD, resulting in a
distinct tunnelling spectrum for every device, as they contain a unique and
unpredictable structure that is presently impossible to clone. This new class of
authentication device operates with minimal resources in simple electronic
structures above room temperature.