Information Encryption Technology Research Articles

Controllable decomposition/recrystallization of water-sensitive CsPbBr3 glass ceramics for dynamic anti‐counterfeiting with high security

Due to the sensitivity to water, the all-inorganic CsPbBr3 nanocrystals have been widely applied in information encryption with spatial dimensions. However, the absence of time-dimension information limits the information capacity for the application of CsPbBr3. In this work, the CsPbBr3 nanocrystal was combined with water-sensitive borophosphate glass, achieving decomposing/recrystallization of CsPbBr3 nanocrystal with multi-dimension. The addition of SiO2 confirms that the collapse of the borophosphate glass network structure causes the exposure of the CsPbBr3 nanocrystals. The decomposition and recrystallization mechanism of CsPbBr3 nanocrystals in glass-ceramics upon encountering water has been verified. Finally, an information encryption strategy, using the mixture of CsPbBr3 glass ceramic and sodium carboxymethylcellulose as ink, is designed via adopting screen-printing technology, which not only provides a new idea for the preparation of CsPbBr3 nanocrystals, but also establish a new avenue for the information encryption technology.

Heavy atom effect boosts the achievement of ultra-efficient long afterglow room temperature phosphorescent carbon point composites: An enhanced approach

In recent years, room temperature phosphorescent (RTP) materials have experienced rapid growth due to their enduring luminescence, high resolution, and other distinctive characteristics. Simultaneously, carbon dots (CDs) have gained popularity across various disciplines for their efficient luminescence, straightforward synthesis, and environmental friendliness. In this study, we successfully synthesized a range of high-performance carbon dot materials using a simple one-step hydrothermal method. Through detailed morphological and photophysical characterizations, we discovered that these materials exhibited a remarkable phosphorescence quantum yield of up to 53.15 %, an impressive feat for both metal and non-metal carbon dot materials. Furthermore, we explored the enhancing effect of the heavy atom on ultra-efficient long afterglow RTP carbon dot composites and experimentally validated its effectiveness. Finally, we applied these materials to information encryption technology, offering novel ideas and methods for RTP material applications. This research not only opens new avenues for the development of carbon dot materials but also provides a promising direction and outlook for their future use.

Programmable multimode optical encryption of advanced printable security inks by integrating structural color with Down/Up- conversion photoluminescence

Optical information encryption with high encoding capacities can significantly boost the security level of anti-counterfeiting in the scenario of guaranteeing the authenticity of a wide scope of common and luxury goods. In this work, a novel counterfeiting material with high-degree complexity is fabricated by microencapsulating cholesteric liquid crystals and triplet–triplet annihilation upconversion fluorophores to integrate structural coloration with fluorescence and upconversion photoluminescence. Moreover, the multimode security ink presents tailorable optical behaviors and programmable abilities on flexible substrates by various printing techniques, which offers distinct information encryption under different optical modes. The advanced strategy provides a practical versatile platform for high-secure-level multimode optical inks with largely enhanced encoding capacities, programmability, printability, and cost-effectiveness, which manifests enormous potentials for information encryption and anti-counterfeiting technology.

Polyacrylamide/sodium alginate/sodium chloride photochromic hydrogel with high conductivity, anti-freezing property and fast response for information storage and electronic skin

Photochromic hydrogels have promising prospects in areas such as wearable device, information encryption technology, optoelectronic display technology, and electronic skin. However, there are strict requirements for the properties of photochromic hydrogels in practical engineering applications, especially in some extreme application environments. The preparation of photochromic hydrogels with high transparency, high toughness, fast response, colour reversibility, excellent electrical conductivity, and anti-freezing property remains a challenge. In this study, a novel photochromic hydrogel (PAAm/SA/NaCl-Mo7) was prepared by loading ammonium molybdate (Mo7) and sodium chloride (NaCl) into a dual-network hydrogel of polyacrylamide (PAAm) and sodium alginate (SA) using a simple one-pot method. PAAm/SA/NaCl-Mo7 hydrogel has excellent conductivity (175.9 S/cm), water retention capacity and anti-freezing properties, which can work normally at a low temperature of −28.4 °C. In addition, the prepared PAAm/SA/NaCl-Mo7 hydrogel exhibits fast response (<15 s), high transparency (>70 %), good toughness (maximum elongation up to 1500 %), good cyclic compression properties at high compressive strains (60 %), good biocompatibility (78.5 %), stable reversible discolouration and excellent sensing properties, which can be used for photoelectric display, information storage and motion monitoring. This work provides a new inspiration for the development of flexible electronic skin devices.

Time‐Dependent Information Encryption in Liquid Crystalline Polymer with Programmable Glass Transition Temperature

AbstractTime‐dependent dynamic information encryption technology is a promising approach to enhancing the security and complexity of information transmission. Herein, a time‐dependent information encryption model from a liquid crystalline polymer (LCP) film with a programmable glass transition temperature (Tg) and gradually adjustable fluorescence is demonstrated. The programmable Tg is achieved by adjusting the degree of order of the LC molecules via a configuration interconversion of spiropyran‐based materials (SPBMs), which can convert between a V‐shaped colorless spiro (SP) and a rodlike dark‐colored merocyanine (MC) form. An LCP film obtained by visible light polymerization exhibits a lower Tg than UV light, because the SPBM molecules keep different configurations in the two films. By adjusting the ratio of two isomerization forms of SPBM molecules during the polymerization process, the Tg values of LCP films can change from 11.6 °C to 31.1 °C. Based on the isomerization rate of SPBM in the LCP films with different Tg, time‐dependent information encryption is successfully achieved.

The design of multifunctional fluorescent probe for detecting Zn2+/ ClO−/H2O and application in high-security level information encryption

In this article, a Schiff base-structured compound (TNB) was synthesized using 3-hydroxy-2-naphthaldehyde hydrazone and 2-hydroxy-5-tert-butylbenzaldehyde as starting materials. The structure of TNB was characterized using NMR spectroscopy, high-resolution MS, and IR spectroscopy. Studies showed that TNB can selectively recognize Zn2+/ClO− in solvent system of H2O/DMSO. Fluorescence and UV–vis spectrophotometry were used to investigate the spectral properties of TNB. TNB displayed a significant fluorescence enhancement effect when bound to Zn2+, while binding to ClO− resulted in fluorescence quenching. Job’s plot and NMR titration were used to study the binding mechanism of TNB with Zn2+/ClO−. Linear standard curves were fitted for different Zn2+/ClO− concentrations corresponding to fluorescence intensity, and detection limits (LOD) were determined as 5.0300 × 10−9 mol/L (Zn2+) and 3.1700 × 10−9 mol/L (ClO−). Furthermore, TNB was used to determine trace water in organic solvents. The fluorescence intensity changes with water content were measured in three organic solvents (THF, DMSO, and acetone). Detection limits (LOD) were calculated as 1.4 × 10−4 % (THF), 8.3 × 10−4 % (DMSO), and 1.2 × 10−3 % (acetone). Using the characteristic reactions of TNB with Zn2+, a two-dimensional code information encryption technology was developed and can be used for high-security information encryption and transmission.

Retracted: Analysis of Co-Construction and Sharing Mechanism of Digital Education Resources based on Digital Information Encryption Technology

Retracted: Analysis of Co-Construction and Sharing Mechanism of Digital Education Resources based on Digital Information Encryption Technology

Dynamic anticounterfeiting polymeric inks for multipurpose time-dependent encryption with a high level of security

Development of dynamic anticounterfeiting inks with time-dependent photochromism and photoluminescence characteristics has become highly interesting in advanced encryption systems. These inks are applicable in different fields, such as tracking UV rays and gas leakage and also quality monitoring. In this study, semi-continuous copolymerization of butyl acrylate and methyl methacrylate in the heterogeneous miniemulsion medium was used to synthesize colloidal nanoparticles with different flexibilities and polarities. Then, hydroxyl-functional spiropyran (SPOH) was physically incorporated into the nanoparticles to prepare photochromic and photoluminescent inks. The nanoparticles showed low light reflectance due to their small size, which makes them applicable in photoresponsive and sensing applications. In addition, the nanoparticles exhibited different glass transition temperature (Tg) that affects their photoresponsivity. Microscopic analysis revealed that all the latex samples have spherical nanoparticles with a mean size of about 70 nm and a low polydispersity index. UV–vis absorption and fluorescence emission spectra, isomerization kinetics, and photofatigue resistance of the photochromic latex nanoparticles were studied, which depend on chain polarity and flexibility of the latex nanoparticles. The optical properties of the photochromic materials are closely related to the structure and composition of the latex samples. Time-dependent features of the inks originate from their spiropyran molecules which gradually turns into the merocyanine form upon visible light induction. Photochromic inks with advanced encryption and dynamic characteristics were developed from the SPOH-doped colloidal latex nanoparticles. Different polarities and Tg of the inks result in their different dynamic chromism, which show their high level of information encryption technology. By virtue of these unique time-dependent properties, the encryption capabilities of these inks are significantly improved. These inks achieved unprecedented advances in the field of information security and encryption because of their innovative features.

Retracted: Application of Information Encryption Technology in Computer Network Communication Security

Retracted: Application of Information Encryption Technology in Computer Network Communication Security

Dynamic Information Encryption Technology by Combining Photochromic Spiropyrans and Carbon Dots

Dynamic Information Encryption Technology by Combining Photochromic Spiropyrans and Carbon Dots

Bipolar Photoresponse in Graphene/GaN Heterostructure and its Secure Function in Free‐Space Optical Communication

AbstractThe free‐space optical communication is regarded as a promising technique for next generation networks. However, all the data are exposed in free space with high risk of being attacked or eavesdropping by unauthorized parties. Here, a bipolar photodetector based on the graphene/GaN heterojunction is demonstrated. The polarity of the UV light photocurrent is opposite to that of the red light photocurrent, which results from the interface state filling effect and hot carrier injection into graphene, verified by Kelvin probe force microscope measurement results. Four stable photocurrent levels are demonstrated with only a single graphene/GaN heterojunction via the photocurrent polarity control, which is employed for a secure capability in conventional optical communication by setting visible and UV light as secret and key information, respectively. The technique provides a new strategy to design photodetectors for information encryption technology.

Four-channel joint-polarization-frequency-multiplexing encryption meta-hologram based on dual-band polarization multiplexing meta-atoms.

Holography is an advanced imaging technology where image information can be reconstructed without a lens. Recently, multiplexing techniques have been widely adapted to realize multiple holographic images or functionalities in a meta-hologram. In this work, a reflective four-channel meta-hologram is proposed to further increase the channel capacity by simultaneously implementing frequency and polarization multiplexing. Compared to the single multiplexing technique, the number of channels achieves a multiplicative growth of the two multiplexing techniques, as well as allowing meta-devices to possess cryptographic characteristics. Specifically, spin-selective functionalities for circular polarizations can be achieved at lower frequency, while different functionalities can be obtained at higher frequency under different linearly polarized incidences. As an illustrative example, a four-channel joint-polarization-frequency-multiplexing meta-hologram is designed, fabricated, and characterized. The measured results agree well with the numerically calculated and full-wave simulated ones, which provides the proposed method with great potential in numerous opportunities such as multi-channel imaging and information encryption technology.

Simple optical encryption and decryption strategy based on bilayer soft actuator and laser-induced structural color.

Advanced encryption and decryption strategies are of great significance for information protection and data security. Visual optical information encryption and decryption technology plays an important role in the field of information security. However, the current optical information encryption technologies have shortcomings such as the need for external decryption equipment, the inability to read out repeatedly, and information leakage, which hinder their practical application. By combining the excellent thermal response characteristics of the MXene-isocyanate propyl triethoxy silane (IPTS)/polyethylene (PE) bilayer and the structural color generated from the laser fabricated biomimetic structural color surface, an approach of encrypt, decrypt, and transmit information has been proposed. The microgroove-induced structural color is attached to the MXene-IPTS/PE bilayer to form a colored soft actuator (CSA) to realize information encryption and decryption, and information transmission. Benefiting from the unique photon-thermal response of the bilayer actuator and the precise spectrum response of the microgroove-induced structural color, the information encryption and decryption system has the advantages of being simple and reliable, which has the potential application in the field of optical information security.

On-demand regulation of decoloration rate of photochromic polymers for self-erased time-dependent information encryption

Nowadays, high security of information encryption technology, especially those time-dependent encrypting, are increasingly important, but remains a great challenge. Herein, we developed a novel time-dependent information encryption technology, which based on a series of photochromic spirooxazine-contained polymers with different rigidity. The color of these polymers can be reversibly switched between blue and colorless via irradiation of UV light and storage in dark. The decoloration rate of these polymers can be modulated by changing the rigidity of the polymers. By taking full advantage of this property, two self-erased time-dependent information encryption strategies were established. After UV irradiation, the encoded information was self-erased with time in dark. During this process, fake or correct information was generated. The correct information was only identified at a pre-designed period of time. This time-dependent property implies new prospect for information encryption with a high level of security.

High capacity optical information encryption technology based on OAM holography and frequency shift

High capacity optical information encryption technology based on OAM holography and frequency shift

Three-channel metasurface based on simultaneous and independent control of near and far field under a single line light source.

Metasurface based on independent and simultaneous control of near field and far field has significant potential for use in multichannel optics platform devices. However, the previous studies cannot satisfy independent and simultaneous control of near field and far field under a single line source, which made a significant challenge to multichannel optical platforms working in a compact environment. To manipulate effectively and freely the amplitude and phase of transmission under line source, Marius' law and Propagation phase was introduced on all-dielectric encoding metasurfaces meta-atoms. The Marius' law and Propagation phase can control the size and rotation angle of meta-atoms to encode grayscale amplitude images and holographic phase images. Finite-difference time-domain simulation results reveal that dual channel metasurface under a single line source achieves the same display effect as the dual channel metasurface under multiple light sources, which proves the feasibility of our studies. Moreover, under different angles of the line source, we encode the near-field binary image by using the degeneracy rotation angle of meta-atoms. Finally, a three-channel metasurface was obtained without affecting the display of the previous two-channel metasurface. As a result, the independent control amplitude, phase, and polarization of the incident light wave were achieved. The proposed metasurface could be applied in creating a multi-channel metasurface optical platform in a compact environment, which has application potential in image displays, optical storage, optical anti-counterfeiting, and information encryption technology.

Application of Information Encryption Technology in Computer Network Communication Security

In order to improve the communication efficiency while ensuring the security of communication information, this paper proposes a design and research method of a computer information security communication method by introducing data encryption technology. A new communication method is proposed through the construction of computer information security communication transmission model, computer information communication user identity authentication, communication information data encryption and decryption processing based on data encryption technology, and computer secondary communication key update. The experimental results show that the new communication method and ZigBee-based communication method are applied to the same communication environment through comparative experiments. The addition of encryption time and decryption time of the experimental group can be basically controlled within 70 ms, while the addition of encryption time and decryption time of the control group exceeds 70 ms, which verifies that the new communication method has higher security and communication efficiency. The introduction of data encryption technology in the actual information communication process can provide guarantee conditions for information security.

Wireless-controlled, self-powered, and patterned information encryption display system based on flexible electroluminescence devices

Information encryption is significantly important for information security, national public safety, and social business, which still face severe challenges of large-scale stimulus decryption equipment, information leakage, and product forgery. Herein, a wireless-controlled, self-powered, and patterned information encryption display system (IEDS) based on flexible electroluminescence (EL) device is developed, in which the EL device based on quick response (QR)/Morse-coded silver electrodes can be directly driven by a wearable triboelectric nanogenerator (W-TENG) to demonstrate programmed pixel-based dynamic EL emission for wireless-controlled information encryption. Moreover, the silver electrodes fabricated by inkjet printing for the EL device demonstrate high conductivity of 1.6 Ω/ sq and excellent flexibility. A wireless control module operated by a smartphone is employed to switch on or off the connection of the W-TENG with the EL device to achieve pixel-based dynamic EL emission for the IEDS, which would provide a novel insight and strategy for implementing advanced information encryption technology.

Analysis of Co-Construction and Sharing Mechanism of Digital Education Resources based on Digital Information Encryption Technology

In order to solve the problem of information security, the process of digital resource development and integration has become the key. A method based on focusing on the development and integration of digital instructions is proposed, which discusses digital data encryption in detail, focusing on the DES algorithm in the symmetric encryption algorithm and the RSA algorithm in the asymmetric encryption algorithm and conducts a security evaluation. Through comparative analysis, the comprehensive communication system based on the combination of DES encryption algorithm and RSA encryption algorithm aims to realize the integration and sharing of digital display. Through experimental analysis and comparison with traditional commonly used encryption methods, 64-bit keys are very easy to generate, but the keys must be distributed before communication, and the keys must be changed from time to time. In this way, key management consumes a lot of system overhead. From the final experimental data, it can be concluded that the encryption algorithm has performance advantages over the separate DES and RSA algorithms.

Antileakage Technology of Computer Video Information Encryption Based on Digital Information Method

In order to better realize and ensure the security performance of network information itself, various possible risks must be prevented in advance, and a more reliable operation environment must be created as much as possible. A research study on computer video information encryption and antileakage technology based on the digital information method is proposed. Through the research on the working principle of computer display systems, this paper analyzes the common leakage sources. On this basis, it analyzes how to protect the electromagnetic wave leaked from the computer display system. Finally, it is proposed that the protective measure adopted in this paper is (transient electronic pulse emission survey technology, tempest) technology; that is, the image is processed at the source of image information to reduce the electromagnetic radiation of useful information. The corresponding digital filter is designed by fir, and the combined filtering of digital filter and analog filter is applied to eliminate the inherent disadvantage of periodic fluctuation of insertion loss of the digital filter. The research results show that the receiver before filtering can receive video images at multiple frequency points such as 20 MHz, 160 MHz, 220 MHz, 250 MHz, 270 MHz, 290 MHz, and 340 MHz, while the receiver after filtering can only receive video images at two frequency points of 20 MHz and 250 MHz, but it cannot recognize the words in the figure, and its effect is very obvious. It verifies the correctness and effectiveness of the theoretical analysis in this paper.