Abstract: Disclosed is a tryptophan optical probe, a preparation method therefor and the use thereof. Disclosed is an optical probe, comprising a tryptophan-sensitive polypeptide or a functional variant thereof and an optically active polypeptide or a functional variant thereof, wherein the optically active polypeptide or the functional variant thereof is located in the sequence of the tryptophan-sensitive polypeptide or the functional variant thereof. Furthermore, disclosed are a method for preparing the above-mentioned probe and the use thereof in the detection of tryptophan.

Abstract: Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of secure network architecture. The method comprises transmitting, at a master device and to an access network device, a first level start-up request with a first identification signature corresponding to a first identification key for identifying the master device, the first identification key being generated based on a master key specific to the master device; receiving, from the access network device, a first level start-up authorization response with a first authorization signature corresponding to a second identification key; and verifying the first authorization signature with the first identification key.