Method for preparing cryptographic primitive based on perovskite crystal and application thereof

A perovskite and crystal technology, applied in the field of cryptographic communication, can solve the problems of low authentication throughput, low efficiency, and high cost of cryptographic primitives, achieving the effects of more pixels, efficient programming and authentication, and strong randomness

Active Publication Date: 2021-08-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a method for preparing cryptographic primitives based on perovskite crystals, and proposes a new application field of component segregation perovskite, which solves the problem of cumbersome preparation of cryptographic primitives an

Method used

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  • Method for preparing cryptographic primitive based on perovskite crystal and application thereof
  • Method for preparing cryptographic primitive based on perovskite crystal and application thereof
  • Method for preparing cryptographic primitive based on perovskite crystal and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Example 1: Verification of the randomness of crystal morphology produced during the evaporation of precursor droplets

[0041] Step 1. Prepare the liquid-repellent substrate

[0042] Perform plasma cleaning on the surface of the silicon wafer substrate, then put 3 μl of perfluorooctyltriethoxysilane in an open vial, and then put it in a closed box with the substrate, and then place the box at 120 °C In the oven for 2 hours, vapor-deposit perfluorooctyltriethoxysilane on the surface of the substrate to modify the surface of the substrate to form a hydrophobic surface. Hydrophilic patterned arrays (such as figure 1 shown), then place it in ethanol for ultrasonic cleaning for 5 minutes and then dry it for later use;

[0043] Step 2. Prepare precursor fluid

[0044] The precursor fluid is CsPbClBr 2 / DMSO, the concentration is 0.1mol / L;

[0045] Step 3. In situ observation of droplet evaporation process

[0046] Place the liquid-friendly substrate obtained in Step 1 u...

Embodiment 2

[0048] Embodiment 2 screens the most suitable evaporation temperature

[0049] Step 1. Prepare the liquid-repellent substrate

[0050] Perform plasma cleaning on the surface of the silicon wafer substrate, then put 5 μl of perfluorooctyltriethoxysilane in an open vial, and then put it in a closed box with the substrate, and then place the box in a 120°C In the oven for 2 hours, vapor-deposit perfluorooctyltriethoxysilane on the surface of the substrate to modify the surface of the substrate to form a hydrophobic surface. The hydrophilic patterned array was obtained, and then it was ultrasonically cleaned in ethanol for 5 minutes and then dried for use;

[0051] Step 2. Prepare precursor fluid

[0052] Prepare three precursor fluids with a concentration of 0.1mol / L. The preparation method is as follows:

[0053] CsPbClBr 2 / DMSO precursor fluid: take 0.1mmol PbBr 2 Dissolve in 10mL DMSO solvent, and stir magnetically at 50°C until the powder is completely dissolved. Then ...

Embodiment 3

[0062] Embodiment 3 The influence of base pattern size on perovskite crystal quantity and size

[0063] Rough hydrophilic pattern arrays with diameters of 40 μm, 60 μm, 80 μm, 100 μm, 120 μm and 140 μm were constructed on the hydrophilic and hydrophobic substrates using the same laser engraving processing parameters to construct CsPbCl 1.5 Br 1.5 Precursor droplet array to ensure other parameters are consistent, including the use of the same precursor solution, the same coating parameters, consistent substrate temperature and ambient humidity during coating, the same temperature and humidity during evaporation in a constant temperature and humidity box, and evaporation time. Finally, we fabricated perovskite crystal arrays with compositional segregation on arrays of hydrophilic-hydrophobic patterns of different sizes. We use SEM to take pictures of its microscopic appearance, and take pictures of the microscopic appearance of one hundred hydrophilic patterns for each size pa...

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Abstract

The invention relates to a method for preparing cryptographic primitives based on perovskite crystals and application thereof, and the method comprises the steps that different chips with component segregation perovskite crystals are prepared, the fluorescence emission spectrum of a target array on the perovskite crystal chips is scanned and read, according to the number of emission peaks of the target array, array patterns are divided into four types: one emission peak, two emission peaks, three emission peaks, and four or more emission peaks, and the coding rules that the pattern of one emission peak is 00, the pattern of two emission peaks is 01, the pattern of three emission peaks is 10, and the pattern of four or more emission peaks is 11 are set; all patterns on the target array are converted into a binary coding array composed of 0 and 1, namely cryptographic primitives of the target array are formed, and the cryptographic primitives can be used for constructing a computer cryptographic security system. The method for preparing the password primitives based on the perovskite crystals has the technical effects of being high in randomness, unclonable, rapid in coding and capable of being produced on a large scale at low cost.

Description

technical field [0001] The invention belongs to the field of cryptographic communication, and specifically relates to a method for preparing cryptographic primitives based on perovskite crystals and an application thereof. Background technique [0002] In the field of communication, it is required that information can be encrypted and decrypted conveniently and cannot be cracked. Physically unclonable functions provide unbreakable encryption to ensure information security. Researchers have developed many cryptographic primitives generated by physical unclonable functions, such as electrical keys, including unclonable keys generated by random circuit conduction, and unclonable keys generated by space-time dynamic images. , cryptographic primitives based on optical responses also have good development prospects in the field of cryptographic communication, such as cryptographic primitives based on random photoluminescence intensity distribution. However, the existing methods ...

Claims

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Application Information

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IPC IPC(8): H04L9/32C30B29/12C30B7/06C23C14/12C23C14/24C23C14/58B23K26/352B23K26/362
CPCH04L9/3278C30B29/12C30B7/06C23C14/24C23C14/12C23C14/5873B23K26/362B23K26/355
Inventor 巫金波赵丽丹温维佳张萌颖薛厂
Owner SHANGHAI UNIV
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