CN111311700A - Method for correcting error of information encryption read-write by using nanotechnology - Google Patents
Method for correcting error of information encryption read-write by using nanotechnology Download PDFInfo
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Abstract
The invention discloses a method for correcting errors of encrypted read-write information by utilizing nanotechnology, which comprises the following steps: uniformly mixing the internal standard molecules and the solvents of the photosensitive molecules which are selected in advance according to a preset proportion; adsorbing the internal standard molecules and the photosensitive molecules on the surface of the coated substrate; irradiating the internal standard molecules and the photosensitive molecules adsorbed on the surface of the substrate by using laser, and repeatedly writing information to be encrypted at least twice; scanning with low-frequency laser by using a spectral two-dimensional imaging technology or a scanning imaging technology and taking fingerprint spectrums of the internal standard molecules and the new molecules as scanning objects to obtain the intensity distribution of the internal standard molecules and the new molecules; repeatedly scanning the intensity distribution imaging of the internal standard molecules and the new molecules to obtain the average intensity distribution of the internal standard molecules and the average intensity distribution of the new molecules; and acquiring the ratio of the average intensity distribution of the new molecules to the average intensity distribution of the internal standard molecules, and imaging according to the ratio to obtain decryption information.
Description
Technical Field
The invention relates to the field of nanotechnology, in particular to a method for correcting errors of information encryption read-write by utilizing nanotechnology.
Background
In recent years, information encryption techniques have relied either on the encryption of electronic signals or the algorithmic encryption of the original information. However, these techniques are well known and are relatively easy to break. With the research in the field of nanotechnology, it has been shown that patterns can be drawn by minimally invasive substrate planes using methods such as nanolithography. And then, the information encryption read-write is carried out by utilizing the nanotechnology.
The process of writing encrypted information into carrier (silicon, quartz, mica, gold, silver, copper, aluminum, glass and alloy, etc. hard material with certain mechanical strength) by using nano technology includes: the method comprises the steps of substrate pretreatment, film coating, photosensitive molecular layer adsorption, encrypted information writing and cut-off layer covering. The process of decrypting the information on the carrier comprises: and scanning the carrier by using a fingerprint spectrum of a predetermined target new molecule as a scanning object by using a spectral two-dimensional imaging (Image) technology or a scanning imaging (Mapping) technology and using low-frequency laser to obtain a specific arrangement of the new molecule, thereby realizing decryption of the information.
However, the following disadvantages still exist in the information encryption process by using the nanotechnology at present:
1. when polishing and cleaning a substrate, due to some accidental factors, the flatness of the substrate cannot be completely guaranteed, and the distribution of the substrate surface is not uniform. So that the film on the substrate is not uniform during film coating, the thickness of the film at different positions is different, the adsorbability of the film to molecules is different, and the non-uniformity during the adsorption of the molecules is caused.
2. When the photosensitive molecular layer is adsorbed, due to the problems of non-uniformity of the substrate and the infiltration degree of the selected photosensitive molecules and the substrate, the complete and uniform adsorption of the photosensitive molecules on the surface of the film cannot be ensured, so that the conditions that the photosensitive molecules are high in some places and low in some places of the film substrate can be caused. The uneven concentration of photosensitive molecules on the film can cause that when encrypted information is written, the concentration of new molecules generated at the position of the film where the concentration of photosensitive molecules is high is also higher, and the concentration of new molecules generated at the position of the film where the concentration of photosensitive molecules is low is also lower. When the information on the carrier is decrypted, because the newly generated molecules are scanned and imaged, the intensity of the fingerprint spectrum relative to the position where the new molecule concentration is high, and the intensity of the fingerprint spectrum relative to the position where the new molecule concentration is low. Therefore, the misinterpretation during reading caused by low strength of the new molecules at some places where the encrypted information is written is obtained, and the scanning area can be considered to be approximately without newly generated molecules compared with the places where the strength of the new molecules is high, so that the finally decrypted information has certain deviation from the encrypted information which is written at first.
Wetting is a phenomenon in which liquids spread along the surface of a solid and adhere to each other when they come into contact with the solid. This is referred to herein as the phenomenon in which the photosensitive molecular solvent spreads along the surface of the substrate. The large wetting angle indicates that the wetting degree is not good, and if a drop of water is on a wax plane, the drop of water can keep a water droplet state, which is called non-wetting; the small wetting angle indicates good wetting, such as a drop of water on clean glass will wet and spread out.
3. When the encrypted information is written, laser and photosensitive molecules generate photocatalysis, and micro interference can be caused due to fluctuation and instability of laser intensity, so that errors are generated when the encrypted information is written. If the written encrypted information is in micrometer scale (also called mesoscopic, the range is in millimeter-micrometer scale), the influence can be ignored when the encrypted information is uneven or laser fluctuation exists, the content of the encrypted information can still be identified, and the mesoscopic writing mode is convenient, but the encryption is not strong. Because the size of the written encrypted information is fine and is in nanometer level (also can be called as microcosmic, the range is in micrometer-nanometer level), the line width and the size of the information are small, the advantages of the information encryption reading and writing method by utilizing the nanotechnology are achieved, meanwhile, certain problems are caused, the requirements on the uniformity of a substrate, the requirements on the uniformity of molecules, the stability of laser writing intensity and the stability of the information during laser reading are very high, and the content of the original encrypted information can be completely changed due to the existence of a little error.
Fig. 1a shows a micrometer-scale character "N", which has certain defects at three positions, namely a diagonal position a at the upper left corner, a dot position B at the lower right corner and a reticulate pattern position C at the inner left side, but does not prevent information reading by using nanotechnology. And S is a photosensitive molecular layer, information is read by using a needle tip enhanced Raman spectroscopy technology, and low-frequency laser 785nm laser of a needle tip enhanced Raman spectroscopy system is used for reading. The carrier is combined to generate the word 'N' according to the imaging of the characteristic peak of the generated new molecule (the characteristic peak is used for identifying a specific molecule). Wherein, the defects at the twill part A can be considered to be caused by the uneven height distribution of the substrate coating film; the defects at the texture C can be considered as non-uniformity of molecular distribution due to non-uniformity of molecular concentration when adsorbing the photosensitive molecular layer; the defect at the point B can be considered as a writing or reading error due to instability or fluctuation of the laser light at the time of catalysis or reading. The final read/write information is shown in fig. 1b, and although the final read/write encrypted information is not greatly affected, there is a certain defect.
When the encrypted information is in the nanometer level, the defect can seriously affect the transmission of the image information. As shown in FIG. 2a, S is a photo-sensitive molecular layer, and the written information is a nano-scale character "N", which has a small line width and size, and if there are A, B, C defects as shown in FIG. 1a, a breakpoint is generated, which becomes similar to "! The shape of 1' changes the original encrypted information, so that the encrypted read information is wrong.
Disclosure of Invention
It is an object of the present invention to provide a method for error correction of encrypted reading and writing of information using nanotechnology that overcomes or at least alleviates at least one of the above-mentioned drawbacks of the prior art.
In order to achieve the above object, the present invention provides a method for correcting errors in encrypted read/write of information by using nanotechnology, comprising:
step one, uniformly mixing solvents of preselected internal standard molecules and photosensitive molecules according to a preset proportion; the difference between the adsorption characteristics of the internal standard molecules and the photosensitive molecules and the infiltration degree of the internal standard molecules and the substrate is in a preset range, the internal standard molecules are not easy to denature, are completely dissolved in the solvent and do not react with the photosensitive molecules, and the distance between the position of a characteristic peak on a fingerprint spectrum of the internal standard molecules and the position of the characteristic peak of the photosensitive molecules and the generated new target molecules is in the preset range and is relatively independent;
adsorbing the internal standard molecules and the photosensitive molecules on the surface of the coated substrate; wherein the photosensitive molecules react to light above a specific frequency to generate the new molecules and do not react to light below the specific frequency;
irradiating the internal standard molecules and the photosensitive molecules adsorbed on the surface of the substrate by using laser, wherein the light spot of the laser is in a nanometer scale, the photosensitive molecules irradiated by the laser react to generate the new molecules, the movement of the laser is controlled according to the information to be encrypted, the information to be encrypted is converted into the specific arrangement of the new molecules, and the information to be encrypted is repeatedly written at least twice;
fourthly, scanning the fingerprint spectrums of the internal standard molecules and the new molecules as scanning objects by using low-frequency laser by using a spectrum two-dimensional imaging technology or a scanning imaging technology to obtain the intensity distribution of the internal standard molecules and the new molecules;
step five, repeatedly scanning the intensity distribution imaging of the internal standard molecules and the new molecules for M times to respectively obtain the intensity distribution I of the internal standard moleculesC1…ICMAnd intensity distribution I of the novel moleculeB1…IBMTo obtain the average intensity distribution of the internal standard molecule
And the average intensity distribution of the novel molecules
M is more than or equal to 2;
step six, obtaining the average intensity distribution I of the new moleculesBAverage intensity with internal standard moleculeDegree distribution ICAnd imaging according to the ratio to obtain decryption information.
Optionally, the obtaining of the decryption information according to the ratio includes: if the ratio is larger than a preset threshold value, imaging is carried out, otherwise, no imaging is carried out.
Optionally, the obtaining of the decryption information according to the ratio includes:
selecting the peak values in the intensity distribution imaging of the M times of internal standard molecules and new molecules to respectively obtain the intensity average value I of the peak valuesCPAnd IBPCalculating to obtain IT＝IBP/ICP；
If the ratio is greater than or equal to ITImaging is performed, otherwise no imaging is performed.
Due to the adoption of the technical scheme, the invention has the following advantages:
the process of encrypting and reading and writing the information by utilizing the nanotechnology is corrected, so that the reading error of the encrypted information is smaller, the accuracy is higher, and the process of encrypting and reading and writing the information has higher application value.
Drawings
FIG. 1a is a schematic diagram of encrypted information to be read and written;
FIG. 1b is a schematic diagram of the prior art after the encrypted information in FIG. 1a is read and written;
FIG. 2a is a schematic diagram of information to be encrypted;
fig. 2b is a schematic diagram of the information to be encrypted in fig. 2a after being encrypted by using the existing nano technology.
Fig. 3 is a schematic flow chart of the method for correcting errors in encrypted reading and writing of information by using nanotechnology according to this embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
The embodiment provides a method for correcting errors of information encryption read-write by using a nanotechnology, which reduces errors in the encryption and decryption processes, increases the accuracy of the decryption process, and ensures that the decrypted information can restore the content of the encrypted information to the maximum extent. As shown in fig. 3, the method includes:
301, mixing the internal standard molecule and photosensitive molecule solvent uniformly according to the preset proportion. The difference between the adsorption property of the internal standard molecule and the photosensitive molecule and the infiltration degree of the internal standard molecule and the substrate is in a preset range, the internal standard molecule is not easy to denature, is completely dissolved in the solvent and does not react with the photosensitive molecule, and the distance between the position of the characteristic peak on the fingerprint spectrum of the internal standard molecule and the position of the characteristic peak of the photosensitive molecule and the generated new target molecule is in the preset range and is relatively independent.
Wherein, pre-selected internal standard molecules and solvents of photosensitive molecules are mixed according to a certain proportion (for example, 2: 1 mixing), and a stirrer is used for stirring to uniformly mix the internal standard molecules and the solvents of the photosensitive molecules.
The adsorption characteristic of the selected internal standard molecules and the degree of infiltration with the substrate are required to be very close to the relevant characteristics of the selected photosensitive molecules, and the internal standard molecules do not react (do not generate chemical reaction when meeting light or heat) along with the change of light frequency, voltage, temperature and time, can be stored for a long time and do not change. The internal standard molecule should be a pure substance not present in the solvent; it must be completely dissolved in solvent, and does not react with the selected photosensitive molecule, and does not react with itself, and the chemical property is stable; the amount of the added internal standard molecules is close to that of the photosensitive molecules; the position of the characteristic peak on the fingerprint spectrum of the internal standard molecule is similar to the positions of the peaks of the photosensitive molecule and the generated target new molecule; and the characteristic peaks of the internal standard molecules are relatively few, can be completely separated from the characteristic peaks on the fingerprint spectrums of the photosensitive molecules in the solvent and the generated target new molecules, and can be relatively independent on a spectrogram.
Because different internal standard molecules have different degrees of infiltration with the substrate, the concentration of molecules is not uniform when the photosensitive molecules and the internal standard molecule layers are adsorbed, and the internal standard molecules and the photosensitive molecules with better infiltration with the substrate are selected. Here, wetting is a phenomenon in which liquids spread along the surface of a solid and adhere to each other when they come into contact with the solid. This is referred to herein as the phenomenon in which the photosensitive molecular solvent spreads along the surface of the substrate. The large wetting angle indicates that the wetting degree is not good, and if a drop of water is on a wax plane, the drop of water can keep a water droplet state, which is called non-wetting; the small wetting angle indicates good wetting, such as a drop of water on clean glass will wet and spread out.
And 302, adsorbing the internal standard molecules and the photosensitive molecules on the surface of the coated substrate. Wherein the photosensitive molecules react to light above a specific frequency to generate the new molecules and do not react to light below the specific frequency.
The internal standard molecules and the photosensitive molecules can be uniformly adsorbed on the surface of the film by utilizing a vapor deposition mode, a rotary coating mode or a mode of soaking the coated substrate into a solvent of the internal standard molecules and the photosensitive molecules which are uniformly mixed, and then placing the substrate in a darkroom for drying; the photosensitive molecules react to light above a specific frequency to form new molecules, and do not react to light below the specific frequency.
For example, in a darkroom environment, a scanning near-field optical microscope or a needle-tip enhanced raman spectroscopy is used, or laser with a nanometer-sized light spot is directly used for irradiating photosensitive molecules for information writing, the laser frequency is adjusted to be higher than a specific frequency, and the molecular reaction in a nanometer-scale region below the probe or in the nanometer-sized light spot range is induced to generate the new molecules; and determining the moving track of the probe or the light spot according to the information to be encrypted, and repeating for M times to enable the generated new molecules to form specific encrypted digital, character or pattern information. The nano-size refers to a size measured in a unit of nano, and includes a measurement range of several nanometers to several hundreds of nanometers.
According to different selected writing modes, the fineness of the reacted molecular region is different, and for the needle tip enhanced Raman spectroscopy technology or the scanning near-field optical microscope and other writing technologies containing the probe, the smaller the curvature radius of the probe is, the finer and clearer the drawn figures, characters or pattern lines are.
The cut-off layer is covered after writing information to prevent the information from being contaminated.
And 304, scanning the fingerprint spectrums of the internal standard molecules and the new molecules as scanning objects by using low-frequency laser by using a spectral two-dimensional imaging technology or a scanning imaging technology to obtain the intensity distribution of the internal standard molecules and the new molecules.
And scanning the carrier by using the fingerprint spectrums of the internal standard molecules and the new molecules as scanning objects and using the low-frequency laser by using a spectral two-dimensional imaging (Image) technology or a scanning imaging (Mapping) technology to obtain intensity distribution imaging of the internal standard molecules and the new molecules.
The technology of spectral two-dimensional imaging (Image) or scanning imaging (Mapping) comprises the following steps: point-by-point scanning Imaging (Mapping), Raman direct integral Imaging (True Raman Imaging), rapid large-area Raman Imaging (StreamLine) and other Raman spectral Imaging technologies; infrared spectroscopy imaging techniques; a raman scanning imaging technique; scanning near-field optical microscope scanning imaging technology or needle point enhanced Raman spectrum scanning imaging technology. The spectral two-dimensional imaging (Image) technology or the scanning imaging (Mapping) technology can convert invisible spectral information into visible images and can directly see the molecular distribution of different fingerprint spectrums.
The laser light used is a laser light having a frequency lower than a specific frequency or higher than a specific wavelength.
For example, taking M ═ 3, scanning 3 times the intensity of the internal standard molecule and imaging the new molecular intensity distribution, and obtaining the intensity I of the internal standard molecule respectivelyC1、IC2、IC3And new molecular strength IB1、IB2、IB3Deriving the average intensity of the photosensitive molecules from an algorithm for calculating the average value
Average intensity of novel molecule
The corresponding distributions are imaged.
And averaging by multiple scanning to reduce errors caused by fluctuation and instability of the laser during reading.
The ratio may characterize the conversion of the photosensitive molecules into new molecules, with a higher conversion indicating that the position is an information writing position and should be imaged. Generally, the greater the conversion rate, the greater the intensity on the corresponding ratio image.
And determining fingerprint spectrums (including Raman spectrums and infrared spectrums) of the selected corresponding internal standard molecules, the photosensitive molecules and the target new molecules. Based on the characteristic peak, the intensity I of the corresponding photosensitive molecule at the scanning area can be obtained by fitting a spectral two-dimensional imaging (Image) technology or a scanning imaging (Mapping) technology (including methods such as a Raman scanning imaging technology, a scanning near-field optical microscope scanning imaging technology or a pinpoint enhanced Raman spectroscopy scanning imaging technology and the like)ACorresponding image, intensity I of new molecule generatedBCorresponding image, intensity of internal standard molecule is ICThe corresponding image.
The conversion rate algorithm of the selected photosensitive molecules for generating the target new molecules by reaction is
Thus, the ratio of the intensity of the new target molecule to the intensity of the internal standard molecule is imaged by the reaction to determine the specific arrangement of the target molecules, so as to draw the corresponding encrypted numbers, characters or patterns.
The image resulting from the error correction can be compared with the image resulting from the direct decryption to achieve a corrective effect.
Therefore, errors caused by nonuniform intensity of new molecules due to nonuniform concentration during the operation of adsorbing photosensitive molecules can be avoided, and the errors caused during decryption can be avoided.
The error correction method provided by the embodiment of the invention has the following advantages:
1. third party molecules (internal standard molecules) are introduced to serve as reference substances of the conversion rate of the photosensitive molecules, so that the ratio of the conversion rate is more accurate than first-level error correction.
2. When the encrypted information is written, writing errors caused by laser fluctuation or unstable laser power in long-time work are avoided, the same encrypted information is written in the same place for M times by adopting a method of writing averaging for many times, and the written encrypted information is more accurate.
3. And averaging the multiple scans to reduce errors caused by laser fluctuation or unstable laser power during writing and reading.
4. The algorithm formula of the internal standard method is brought in, and the two-stage error correction method can avoid errors in decryption caused by non-uniform intensity of reading new molecules due to accidental factors such as non-uniform substrate or non-uniform molecular concentration during operation of adsorbing photosensitive molecules, so that decryption and error correction of the information are realized, and the accuracy of the information is maintained.
The decryption and error correction of the encrypted information are realized by combining the photosensitive technology and the spectrum detection, so that the difficulty of decrypting the encrypted information is high, the error is small, the accuracy is high, and the process of encrypting, reading and writing the information has higher application value and is more complete. Has strong scientific research and application value.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Those of ordinary skill in the art will understand that: modifications can be made to the technical solutions described in the foregoing embodiments, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. A method for correcting errors of information encryption read-write by utilizing nanotechnology is characterized by comprising the following steps:
step one, uniformly mixing solvents of preselected internal standard molecules and photosensitive molecules according to a preset proportion; the difference between the adsorption characteristics of the internal standard molecules and the photosensitive molecules and the infiltration degree of the internal standard molecules and the substrate is in a preset range, the internal standard molecules are not easy to denature, are completely dissolved in the solvent and do not react with the photosensitive molecules, and the distance between the position of a characteristic peak on a fingerprint spectrum of the internal standard molecules and the position of the characteristic peak of the photosensitive molecules and the generated new target molecules is in the preset range and is relatively independent;
adsorbing the internal standard molecules and the photosensitive molecules on the surface of the coated substrate; wherein the photosensitive molecules react to light above a specific frequency to generate the new molecules and do not react to light below the specific frequency;
irradiating the internal standard molecules and the photosensitive molecules adsorbed on the surface of the substrate by using laser, wherein the light spot of the laser is in a nanometer scale, the photosensitive molecules irradiated by the laser react to generate the new molecules, the movement of the laser is controlled according to the information to be encrypted, the information to be encrypted is converted into the specific arrangement of the new molecules, and the information to be encrypted is repeatedly written at least twice;
fourthly, scanning the fingerprint spectrums of the internal standard molecules and the new molecules as scanning objects by using low-frequency laser by using a spectrum two-dimensional imaging technology or a scanning imaging technology to obtain the intensity distribution of the internal standard molecules and the new molecules;
step five, repeatedly scanning the intensity distribution imaging of the internal standard molecules and the new molecules for M times to respectively obtain the intensity distribution I of the internal standard moleculesC1…ICMAnd the strength of the novel moleculeDistribution IB1…IBMTo obtain the average intensity distribution of the internal standard molecule
And the average intensity distribution of the novel molecules
M is more than or equal to 2;
step six, obtaining the average intensity distribution I of the new moleculesBAverage intensity distribution with internal standard molecule ICAnd imaging according to the ratio to obtain decryption information.
2. The method of claim 1, wherein the obtaining of the decryption information by imaging according to the ratio comprises: if the ratio is larger than a preset threshold value, imaging is carried out, otherwise, no imaging is carried out.
3. The method of claim 1, wherein the obtaining of the decryption information by imaging according to the ratio comprises:
selecting the peak values in the intensity distribution imaging of the M times of internal standard molecules and new molecules to respectively obtain the intensity average value I of the peak valuesCPAnd IBPCalculating to obtain IT＝IBP/ICP；
If the ratio is greater than or equal to ITImaging is performed, otherwise no imaging is performed.
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