Application of 2, 2' -biphenyl imidazole and derivatives thereof in secret graphic information
阅读说明：本技术 2,2′-联苯并咪唑及其衍生物在保密图文信息里的应用 (Application of 2, 2' -biphenyl imidazole and derivatives thereof in secret graphic information ) 是由 姚虹 阚晓彤 章立 周琦 魏太保 张有明 林奇 于 2019-11-08 设计创作，主要内容包括：本发明公开了一种2,2′-联苯并咪唑及其衍生物作为显影材料在保密图文信息里的应用,通过用2,2′-联苯并咪唑及其衍生物作为显影材料来形成保密图文信息,其仅能够在紫外线条件下才能显影,在自然光条件下隐藏,达到保密状态,同时,如需要其在紫外线下图文信息隐藏,则配套使用含有银离子或/和汞离子的消影材料来遮蔽图文信息,由此提高了保密级别,同时,当需要再现被隐藏的图文信息时,通过配套使用含有碘离子或/和氰根离子的再显影材料来使被遮蔽的图文信息再现,由此实现了仅在特定条件下使保密图文信息反复隐藏和重现的目的,可用于高保密级别的信息安全防护领域中。(The invention discloses an application of 2,2 '-biphenyl imidazole and derivatives thereof as developing materials in secret graphic information, wherein the secret graphic information is formed by using the 2, 2' -biphenyl imidazole and the derivatives thereof as the developing materials, the secret graphic information can be developed only under the ultraviolet condition and is hidden under the natural light condition to achieve the secret state, meanwhile, if the secret graphic information is needed to be hidden under the ultraviolet, a shadow eliminating material containing silver ions or/and mercury ions is matched to shield the graphic information, thereby improving the secret level, and simultaneously, when the hidden graphic information needs to be reproduced, the shielded graphic information is reproduced by matching a re-developing material containing iodine ions or/and cyanide ions, thereby realizing the purpose of repeatedly hiding and reproducing the secret graphic information only under specific conditions, the method can be used in the field of information security protection with high security level.)
Use of 2, 2' -bibenzoimidazole and derivatives thereof for the encryption of pictorial information.
2. Use according to claim 1, characterized in that the 2, 2' -bibenzoimidazole and its derivatives are used to form security teletext information.
3. Use according to claim 2, characterized in that the 2, 2' -bibenzoimidazole and its derivatives form a security graphic in the form of a liquid solution, which security graphic is invisible to the naked eye under natural light conditions and is displayed under uv irradiation after drying.
4. Use according to claim 3, wherein the 2, 2' -bibenzoimidazole and derivatives thereof are mixed with an organic solvent to form a liquid solution, which is then used to form the security teletext information.
5. Use according to claim 4, wherein the 2, 2' -bibenzoimidazole and its derivatives form a liquid solution by mixing with water and ethanol.
6. The image-eliminating material applied to the confidential image-text information is characterized in that 2, 2' -biphenyl imidazole and derivatives thereof are used as developing materials to form the confidential image-text information, the image-eliminating material is a liquid solution containing silver ions or/and mercury ions, and the image-eliminating material is in contact with the confidential image-text information to realize the image elimination of the confidential image-text information under the ultraviolet condition.
7. A re-developing material applied to confidential image-text information is characterized in that the re-developing material is a liquid solution containing iodine ions or/and cyanide ions, 2, 2' -biphenyl imidazole and derivatives thereof are used as a developing material to form the confidential image-text information, the confidential information is subjected to image elimination by a liquid image eliminating material containing silver ions or/and mercury ions, and the re-developing material is in contact with the image-text information after image elimination to realize re-development of the confidential image-text information under the condition of ultraviolet rays.
8. A method for repeatedly hiding/reproducing graphic and text information applied to the confidential graphic and text information is characterized in that liquid containing 2, 2' -biphenyl imidazole and derivatives thereof is used as a developing material to form the confidential graphic and text information, the graphic and text information is invisible to naked eyes under natural light conditions and is displayed under ultraviolet irradiation conditions, when the graphic and text information is required to be displayed under the ultraviolet irradiation conditions, the graphic and text information can be hidden by vanishing after being contacted with a liquid vanishing material containing silver ions or/and mercury ions, and when the graphic and text information is required to be developed again, the graphic and text information can be reproduced by being contacted with a liquid re-developing material containing iodide ions or/and cyanide ions.
9. The method of claim 8, wherein the repeated concealment/reproduction of the secure teletext information is performed by repeated use of a shadow-reducing material or a re-developing material when repeated concealment or reproduction of the secure teletext information is required.
Technical Field
The invention relates to the technical field of security image-text information, in particular to application of 2, 2' -biphenyl imidazole and derivatives thereof as developing materials in security image-text information.
Background
With the continuous development of information security protection means, the protection means for electronic files and paper files are more and more abundant and diversified, and information leakage of different forms is restrained to a great extent. However, the information carrier, i.e. a handwritten paper document, does not have a good protection method, and is very easy to leak secret in the transmission process, and the traditional protection methods such as the measures adopted in the transportation process, the document closure and the like do not meet the requirements of the security and confidentiality level all the time.
In some conventional security measures, a magic pen (also called a word erasing pen) is a conventional selection mode, and image and text information written by the magic pen reacts irreversibly with changes of environment and time (an unstable compound is used in the magic pen to develop color, and the compound is slowly decomposed under the conditions of air, temperature and humidity), so that the original written image and text information disappears, and the purpose of security is achieved. Certainly, some image-text information written by the magic pen can be developed again under the condition of being cooled or heated, and the disappeared image-text information can also be developed again through a chemical reagent, however, for the technical means of developing again under the condition of being cooled or heated, when the technical means is used for writing the confidential image-text information, the confidentiality safety level is obviously not enough, the influence of the environmental temperature is larger, the artificial limitation is less, for the technical means of developing the disappeared image-text information again through the chemical reagent, the technical means is known by people, the confidentiality safety level is not easy to establish, the reversibility is poor, the technical effect of repeated hiding/displaying is not easy to realize, the requirement of high confidentiality level cannot be achieved, meanwhile, the image-text information written by the magic pen is mainly judged by naked eyes to hide/display the image-text information, and under the ultraviolet condition, the image-text information can be completely displayed, and cannot be completely hidden when the reproducible requirement is met, and the requirement of high confidentiality level cannot be met.
2,2 ' -biphenyl imidazole and its derivant are a kind of compound with important application value in fields such as medicine, chemistry and chemistry, etc., in the medicine, it is mainly used as anticancer, antifungal, antirheumatic, analgesic and antiphlogistic, in the chemistry and chemistry, it is mainly used as catalyst, epoxy resin novel curing agent and surface treatment agent of some metals, etc., as to 2,2 ' -biphenyl imidazole and its derivant synthesis and purification technology, can refer to literature Thangyof, Zhang Miao et al, 2 ' -biphenyl imidazole synthesis and purification [ J ] chemical reagent, 2007, 29(12), 733-735. However, the application of 2,2 '-biphenylimidazole and its derivatives to information security has not been reported, and the present inventors have found that the application of 2, 2' -biphenylimidazole and its derivatives to information security can solve the problem of high protection of existing security graphic information and can achieve excellent effects, and thus have completed the present invention.
Disclosure of Invention
In view of the above existing problems, a first object of the present invention is to: the application of the 2, 2' -biphenyl imidazole and derivatives thereof as developing materials in the confidential image and text information is provided, so that the problem of high protection of the confidential image and text information is solved.
The technical scheme adopted by the invention is as follows: the use of 2, 2' -bibenzoimidazole and derivatives thereof for the encryption of pictorial information.
Further, the 2, 2' -biphenyl imidazole and derivatives thereof are used for forming confidential graphic and text information.
Further, the 2, 2' -biphenyl imidazole and the derivatives thereof form the security graphic information in the form of liquid solution, after the formed security graphic information is dried, the security graphic information can not be seen by naked eyes under the condition of natural light, and the security graphic information can be displayed only under the condition of ultraviolet irradiation.
Further, in order to better form the security graphic and text information and facilitate the writing and use of a user, the 2,2 '-biphenyl imidazole and the derivatives thereof are mixed with an organic solvent to form a liquid solution, then the liquid solution is used for forming the security graphic and text information, namely, the 2, 2' -biphenyl imidazole and the derivatives thereof are prepared into writing ink, the graphic and text information is written by the ink, after water stains disappear, the written graphic and text information cannot be seen by naked eyes and can only be seen under the ultraviolet condition, so that the high security level is achieved, and the organic solvent can be ethanol, ether, chlorinated ethanol and the like, preferably ethanol.
Further, in order to dry the handwriting faster in the natural state, dissolve 2,2 '-biphenyl imidazole and its derivatives, and eliminate the influence of cations on the fluorescence, the 2, 2' -biphenyl imidazole and its derivatives are mixed with water and ethanol to form a liquid solution. The 2,2 '-biphenyl imidazole and derivatives thereof are dissolved by introducing ethanol, the drying of handwriting is accelerated, written graphic and text information is quickly hidden, the dried graphic and text information can be observed only under the ultraviolet condition, and meanwhile, the influence of cations on fluorescence can be eliminated by introducing water, so that the fluorescence generated by the 2, 2' -biphenyl imidazole and derivatives thereof is more obvious.
The second purpose of the invention is that: the shadow eliminating material can hide the security image-text information formed by 2, 2' -biphenyl imidazole and derivatives thereof under the condition of ultraviolet rays, thereby achieving high security level and overcoming the problem that the existing image-text information can not be hidden under the conditions of natural light and ultraviolet rays.
The technical scheme adopted by the invention is as follows: the 2, 2' -biphenyl imidazole and derivatives thereof are used as developing materials to form the confidential image-text information, the vanishing material is a liquid solution containing silver ions or/and mercury ions, and the vanishing material is in contact with the confidential image-text information and realizes the vanishing of the confidential image-text information under the ultraviolet condition.
In the shadow eliminating material, when 14 common cations are respectively contacted with the 2,2 ' -biphenyl imidazole and the derivatives thereof, the inventor only combines silver ions and mercury ions with the 2,2 ' -biphenyl imidazole and the derivatives thereof, and has the technical effect of shielding fluorescence generated by the 2,2 ' -biphenyl imidazole and the derivatives thereof under the condition of ultraviolet light, other cations do not have the effect or have poor effect, and some cations also have the adverse effect of enhancing the fluorescence intensity, so that the invention only selects the silver ions and the mercury ions as the shadow eliminating material. Of course, it is preferred to use silver ion or/and mercury ion-containing liquid solutions without coloring, such as silver perchlorate solutions, mercury perchlorate solutions, etc., in view of the fact that certain silver ion or/and mercury ion-containing liquid solutions may themselves be colored or may be colored.
In order to make the above-mentioned obscured teletext information visible again in ultraviolet light conditions and not in natural light conditions, a third object of the invention is to: a re-developing material for use in secret graphic information is provided, by which the graphic information can be re-displayed under ultraviolet light conditions and can be still hidden under natural light conditions, thereby facilitating transmission and storage of the secret graphic information.
The technical scheme adopted by the invention is as follows: the re-developing material is a liquid solution containing iodine ions or/and cyanide ions, 2, 2' -biphenyl imidazole and derivatives thereof are used as a developing material to form the confidential image-text information, after the confidential information is subjected to image elimination by a liquid image eliminating material containing silver ions or/and mercury ions, the re-developing material is contacted with the image-text information after image elimination, and the re-developing of the confidential image-text information is realized under the ultraviolet condition.
In the re-developing material, in order to enable the shielded graphic and text information to be displayed again under the ultraviolet condition, the silver ions and the mercury ions existing in the original image elimination material can be eliminated through the ion coordination principle, namely, the silver ions and the mercury ions can quickly form precipitates, the ion shielding influence is singly eliminated under the condition that the basic properties of the 2, 2' -biphenyl imidazole and derivatives thereof are not changed, the graphic and text information is displayed again under the ultraviolet condition, and the technical effect is outstanding.Further, among the common anions, more than iodide and cyanide ions (i.e., CN) capable of forming precipitates with both silver and mercury ions-) However, only the iodide ions and the cyanide ions do not bring other side effects, and no color is introduced to enable the graphic and text information to be developed under the natural light condition, and the using effect is optimal, therefore, the invention only selects the liquid solution containing the iodide ions or/and the cyanide ions as the re-developing material, correspondingly, in consideration of the fact that some liquid solutions containing the iodide ions or/and the cyanide ions have colors or can generate colors to affect the hiding effect, the invention preferentially selects the liquid solution containing the iodide ions or/and the cyanide ions which can not introduce colors, such as tetrabutylammonium iodide solution, sodium cyanide solution, potassium cyanide solution and the like.
The fourth purpose of the invention is that: the method can ensure that the confidential image-text information can be repeatedly hidden and reproduced only under the condition of ultraviolet rays and can always keep the technical effect of a hidden state under the condition of natural light, thereby ensuring that the confidential image-text information can be repeatedly checked and hidden, facilitating the confidential transmission and check of an information carrier (such as a paper text) formed by the confidential image-text information and ensuring the high confidentiality level of the confidential information carrier.
The technical scheme adopted by the invention is as follows: the method comprises the steps of forming confidential graphic and text information by using a liquid solution containing 2, 2' -biphenyl imidazole and derivatives thereof as a developing material, wherein the graphic and text information is invisible to naked eyes under natural light conditions and is displayed under ultraviolet irradiation conditions, when the graphic and text information is required to be displayed under the ultraviolet irradiation conditions, the graphic and text information can be hidden by vanishing after being contacted with a liquid vanishing material containing silver ions or/and mercury ions, and when the graphic and text information is required to be developed again, the graphic and text information can be reproduced by being contacted with a liquid redisplaying material containing iodide ions or/and cyanide ions.
Furthermore, in the method, when the confidential image-text information needs to be repeatedly hidden or reproduced, the shadow eliminating material or the re-developing material is repeatedly used, so that the use is very convenient.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the 2, 2' -biphenyl imidazole and derivatives thereof provided by the invention are applied to confidential graphic information, the formed graphic information can be only visible under the ultraviolet condition, the properties are stable and reliable, the chemical properties are not easy to change, and the problem of high protection of the confidential graphic information is solved;
2. the shadow eliminating material used in cooperation with the shadow eliminating material provided by the invention can enable the confidential image-text information formed by the 2, 2' -biphenyl imidazole and the derivatives thereof to be hidden under the ultraviolet condition, thereby achieving a high confidential level and overcoming the problem that the existing image-text information can not be hidden under the natural light and ultraviolet condition at the same time;
3. the re-developing material used in cooperation with the re-developing material provided by the invention can enable the image-text information to be displayed again under the ultraviolet condition and still be in a hidden state under the natural light condition, so that the transmission and the storage of the confidential image-text information are facilitated under the condition of ensuring the confidentiality grade, and the aim of repeatedly hiding and reproducing the confidential image-text information under the specific condition is finally realized.
Drawings
FIG. 1 is a color of ink, an eradicator solution, and a recurrent solution in natural light;
FIG. 2 is a color of ink, an eradicator liquid, and a recurrent liquid under an ultraviolet lamp;
FIG. 3 shows the effect of writing with ink under natural light and ultraviolet light, respectively;
FIG. 4 is the effect of the spray application of the eradicator solution 1 of FIG. 3 under natural light and ultraviolet light, respectively;
FIG. 5 is a graph showing the effect of the recurrent liquid 1 sprayed on FIG. 4 under natural light and an ultraviolet lamp, respectively;
FIG. 6 is a graph of the effect of writing other characters with ink under natural light and ultraviolet light, respectively;
FIG. 7 is the effect of the
FIG. 8 is a graph of the effect of the
FIG. 1A is a grayscale image of the color picture of FIG. 1;
FIG. 2A is a grayscale image of the color picture of FIG. 2;
FIG. 3A is a grayscale image of the color picture of FIG. 3;
FIG. 4A is a grayscale image of the color picture of FIG. 4;
FIG. 5A is a grayscale image of the color picture of FIG. 5;
FIG. 6A is a grayscale image of the color picture of FIG. 6;
FIG. 7A is a grayscale image of the color picture of FIG. 7;
fig. 8A is a grayscale image of the color picture of fig. 8.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
1. Solution preparation
Preparing ink: mixing 2,2 '-biphenyl imidazole, ethanol and water to prepare solution, wherein the concentration of the 2, 2' -biphenyl imidazole is 2 x 10-3M (M represents mol/L), and the preparation method thereof can be referred to the document "Synthesis and purification of 2, 2' -Biphenyl imidazole" mentioned in the background art, and ethanol accounts for 75 wt% (wt% represents mass fraction). Of course, it may be prepared in a different ratio from the above-mentioned ratio, and for example, the concentration of 2, 2' -bibenzoimidazole may be (1-10). times.10-3M is selected, and the proportion of ethanol can be selected from 0 to 80 wt%.
Eradicating solution 1 (i.e., eradicating material example 1): selecting the concentration of 1 × 10-1M silver perchlorate solution.
Eradicating solution 2 (i.e., eradicating material example 2): selecting the concentration of 1 × 10-1M mercuric perchlorate solution.
The concentrations of the above-described
Reproduction solution 1 (i.e., re-development material example 1): selecting the concentration of 5 × 10-2M tetrabutylammonium iodide solution.
Reproduction liquid 2 (i.e. re-development material example 2): selecting the concentration of 5 × 10-2M sodium cyanide solution.
Accordingly, the concentrations of the above-described
2. Procedure of the test
The method comprises the steps of using a prepared ethanol aqueous solution of 2, 2' -biphenyl imidazole as an ink to write characters on paper, airing, observing the conditions under natural light and an ultraviolet lamp respectively, then spraying an eliminating liquid 1 or an eliminating
3. Results of the experiment
As shown in fig. 1 and 2, under natural light conditions, the prepared ink presents a yellow-green translucent state, and the eliminating liquid 1, the eliminating
As shown in fig. 3 to 5, in fig. 3, after the characters of "northwest master" are written with the prepared ink and dried, the characters are invisible under the condition of natural light, so that the hiding effect is achieved, and the characters are displayed under the condition of an ultraviolet lamp; in fig. 4, after the 3 characters of the northwest engineer in fig. 3 are sprayed with the removing liquid 1 and dried, the characters are invisible under natural light conditions, the 3 characters of the northwest engineer are blocked and invisible under ultraviolet lamp conditions, and the unblocked large characters are visible, thereby illustrating that the removing liquid 1 has excellent shielding effect; in fig. 5, after the 3 characters of the northwest master in fig. 4 are sprayed with the reappearing liquid 1 and dried, the characters are still invisible under the condition of natural light, the 4 characters of the northwest master are displayed under the condition of an ultraviolet lamp, and an obvious spraying trace is formed near the 3 characters of the northwest master, so that the reappearing liquid 1 can reappear the shielded characters and has an excellent reappearing effect.
As shown in fig. 6 to 8, in fig. 6, after the "NWNu" character is written with the prepared ink and dried, the character is invisible under the natural light condition and appears under the ultraviolet lamp condition; in fig. 7, after spraying and drying the 3 words of "NWN" of fig. 6 with the
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
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