Forgery-proof autonomous seal having a plurality of crypto-fiduciary security levels for securing documents

Abstract

The present invention relates to a forgery-proof autonomous seal having a plurality of crypto-fiduciary security levels for securing documents. It is in fact a manual stamping device made of wood, plastic or any other material, not requiring an inkpad, for authenticating documents. The security levels are seven in number. It is a technical solution that is a complete improvement on every means for securing documents by means of stamping that exist on the market at the present time. It in particular comprises a handle that is used to hold the seal and a rectangular, square or oval setting, to or on which all the security elements are added or etched at the time of its manufacture. The various levels of crypto-fiduciary security that this innovative seal comprises make any attempt at imitation or counterfeiting ineffective and impossible. Due to its aforementioned features, this seal is recommended for senior political, administrative, judicial and financial authorities and senior figures in the business world, the documents of which are sometimes the target of malicious actors.

Description

I. INTRODUCTION The present invention relates to an autonomous unforgeable Seal with multiple levels of crypto-fiduciary security for securing documents. It is, in fact, a manual wooden stamping Device, with no inkwell, no inker and no ink cartridge, combining several levels of cryptographic, fiduciary and biometric security to authenticate documents.There are six 6 security levels. Due to their complexity, they make the documents on which the stamping is affixed unforgeable.Indeed, the issue of authenticating documents, of whatever nature (administrative, financial, judicial, commercial, etc.), is a major and constantly recurring concern. This concern is gaining more ground at a time when it is increasingly easy, by virtue of computer applications, to modify a text or the seal that accompanies it.Not a week goes by without complaints being registered here or there, most of the time relating to the imitation or forgery of the stamping of administrative or judicial documents, with serious legal consequences. Moreover, a close relative suffered many years of detention, including his family, because of a forged document.However, traditionally and to this day, documents are authenticated using a manual, single-colour wooden or rubber stamp, personalised or not, and with an inkwell. Single-colour stamps have security limitations, as the stamping can easily be scanned and reproduced.In addition, these stamps, whether made of wood or rubber, can present variations in the quality of the stamping depending on the pressure applied or the amount of ink used, which can result in illegible or inconsistent stampings.All these limitations associated with document authentication and security have led us to consider how to resolve this issue once and for all.II. STATE OF THE ART In the current market, document security and authentication rely primarily on two distinct approaches, each of which has critical technical vulnerabilities that the present invention aims to resolve simultaneously. a) Traditional physical devices. These include pre-inked stamps, single-colour wooden or rubber stamps, wax seals, security stickers and embossed dry stamps or seals. Although autonomous, economical and easy to use, these devices share a common structural weakness: their mark is static, devoid of any cryptographic or biometric security layer, and therefore highly reproducible by moulding, visual reverse engineering, or simple copying by high-resolution scanning or photographing. Variations in pressure or in the amount of ink applied also affect the legibility and consistency of the stamping, which makes it difficult to verify its authenticity over time. b) Electronic and digital devices. This second family includes dynamic digital stamps, electronic seals and QR code signature systems, including in particular the solutions described in documents US 2020 / 039268 A1 and CN 202480566 U. These devices make it possible to generate barcodes, QR codes or cryptographic signatures by computer at the time of stamping. However, their operation is intrinsically dependent on an on-board electronic infrastructure: processor, memory, display and power source. This hardware dependency is their main technical vulnerability, in several respects: (i) it exposes the device to hacking and compromise of the digital signature key; (ii) it renders the device completely inoperable in any environment without access to electricity or a data network; and (iii) it requires maintenance, software updates and security management of the stored data, which are additional sources of vulnerability. There is therefore, at the date of this application, an unmet technical need for a manual stamping device capable of offering a level of cryptographic, fiduciary and biometric security equivalent to or greater than that of the electronic devices of the prior art, while being completely free, during its use, from any dependence on an electronic or computer component or on a power source. The present invention precisely addresses this technical problem by integrating security elements that are optically readable under ultraviolet radiation into the die of the seal itself, which are transferred to the document by manual pressure alone without calculation or computer generation at the time of stamping.III. DESCRIPTION OF THE INVENTION The present invention, called “autonomous unforgeable seal with multiple levels of crypto-fiduciary security”, solves the technical problem set out hereinabove, namely the structural vulnerability of electronic authentication systems and the reproducibility of conventional physical stamps. The invention consists of an exclusively manual and materially autonomous stamping device. Unlike solutions from the prior art in the electronic field, it has no circuitry, no chip, no display, and requires no power source or network connection to generate or transfer its security elements. The cryptography is therefore not calculated dynamically by a processor: it is structurally and chemically integrated, upstream, into the physical die of the seal, by engraving and the application of fiduciary-grade inks. The mark obtained by simple manual pressure then instantly transfers a multi-layer security architecture to the document, combining elements that are visible and elements that are invisible to the naked eye. The structure of this document comprises a brief description of the invention and a detailed description. III.1. Brief description of the invention The autonomous unforgeable seal, which is the subject of this invention, makes it possible to remedy the drawbacks associated with the counterfeiting of document stamping, whether this results from a crude physical reproduction or from a computer attack targeting an electronic device. The mark of the seal incorporates up to seven (7) inseparable security elements of an optical, chemical and structural nature, which combine to make any attempt at forgery materially and technically impracticable, while being carried out exclusively by mechanical and optical means, without any computer generation at the time of stamping. Indeed, the combination of these security elements reinforces the authenticity of the mark due to their distinct characteristics: the potential vulnerability of an element taken in isolation is offset by the characteristics of the other elements making up the seal. The autonomous unforgeable seal thus comprises, inseparably:A grip handle, made of wood or an equivalent rigid material;A stamping die (frame) without an external inkwell or ink cartridge, on which the security elements are affixed or engraved;A multi-colour mark with variable optics, visible to the naked eye and reacting under ultraviolet (UV) radiation;A fingerprint (biometric data), physically invisible to the naked eye and revealed only under UV radiation;A static QR code, invisible to the naked eye and readable only under UV light, containing the unique information of the holder;A complex multi-colour graphic pattern, invisible to the naked eye and visible under UV light, the line density of which prevents any faithful reproduction by scanning or photographing;An encrypted alphanumeric code of fifteen (15) characters, invisible to the naked eye and visible under UV light, serving as a path to an external stamping order certificate. III.2. Detailed description of the invention The autonomous unforgeable seal, which is the subject of this invention, comprises, in detail and with reference to Figure 1 of the attached plate I / I, seven (7) discrete parts, inseparable from each other and cooperating together to ensure the authentication function. These are: 1. A grip handle or frame of the seal. This is used to hold the seal by hand and to exert the stamping pressure. It is made of wood or any equivalent rigid material. Attached to this handle is a rectangular, square or oval die, without any external inkwell, inker or ink cartridge, and on which all the crypto-fiduciary and biometric security elements described below are affixed or permanently engraved during the manufacture of the seal. 2. A multi-colour mark with variable Ultraviolet optics. Visible to the naked eye in ambient light, this mark changes its colour appearance when exposed to the radiation of an ultraviolet reader, due to the effect of the optically variable pigments integrated into the fiduciary ink used. This change constitutes a first level of rapid verification, accessible without complex equipment. 3. An invisible fingerprint. This biometric data is printed using an ink that is structurally invisible to the naked eye in ambient light, and is only revealed under the effect of ultraviolet radiation. It makes it possible to link the mark to the unique physical identity of the authorised holder of the seal. 4. A stamping order certificate. This unforgeable certificate is associated with a unique encrypted alphanumeric identifier, which is itself invisible to the naked eye and readable only under UV radiation. The stamping order certificate contains digital data as well as a second secure document containing the biometric data of the holder, the whole being encrypted in a code that can be subsequently decrypted by optical reading using a web browser, a smartphone, a tablet or a PC, without any connection or electronic component being required on the seal itself. 5. An invisible QR code. Static and engraved in the die of the seal, this QR code is only visible and readable under ultraviolet light. It contains the unique information specific to each holder of the seal, transferred to the document by simple mechanical pressure, without computer generation at the time of stamping. 6. An invisible complex multi-colour pattern. The density and complexity of this graphic pattern, invisible to the naked eye and revealed under UV light, prevent any faithful reproduction of the document by photocopying, photographing or optical scanning, with the fine pattern grid generating a moiré effect or a loss of definition during any attempt at copying. 7. An encrypted alphanumeric code of fifteen (15) characters, invisible to the naked eye. Visible only under UV radiation, this code constitutes the mechanical and optical access path to the stamping order certificate described in point 4 hereinabove, thus making it possible to close the authentication chain between the physical mark and the associated digital and biometric data. It is emphasised that all seven of the aforementioned elements are transferred to the document in a purely mechanical and optical manner, by a single manual stamping action, without any calculation, code generation or electrical power supply being involved at the time of stamping. This feature fundamentally distinguishes the invention from electronic devices in the prior art, which dynamically calculate and generate their security codes by means of an on-board processor. 

Claims

CLAIMS 1. Self-contained, tamper-proof seal with several levels of cryptofiduciary security for securing documents, said seal is a manual wooden stamp without inkwell, without ink pad and without ink cassette with integrated biometric, fiduciary and cryptographic security features characterized in that it mainly comprises, and in a non-exhaustive manner, a wooden handle which is used to hold the stamp and a rectangular, square or oval frame, on which all the security elements affixed or engraved therein are framed.

2. Unforgeable standalone seal with several levels of cryptofiduciary security for securing documents according to claim 1, characterized in that it comprises a visible multi-color stamp with variable Ultraviolet optics which changes color under the light of an Ultraviolet ray reader.

3. Unforgeable standalone seal with several levels of cryptofiduciary security for securing documents according to claims 1 and 2, characterized in that it comprises a fingerprint invisible to the naked eye but visible only under the light of an Ultraviolet (UV) ray reader.

4. Unforgeable standalone seal with several levels of cryptofiduciary security for securing documents according to the preceding claims, characterized in that it comprises a stamp order certificate which is unforgeable, integrated in an encrypted alphanumeric unique identifier code invisible to the eye but visible and readable under the light of an Ultraviolet ray reader, said stamp order certificate contains digital data and a second secure document containing biometric data, said second document is encrypted in a code which can be read in a web reader, in a smartphone, a tablet or a PC.

5. Unforgeable standalone seal with several levels of cryptofiduciary security for securing documents according to the preceding claims, characterized in that it comprises a QR code invisible to the naked eye but visible under the light of an Ultraviolet (UV) ray reader and containing the unique information of each holder of the seal.

6. Self-contained, tamper-evident seal with several levels of cryptofiduciary security for securing documents according to the preceding claims, characterized in that it comprises a complex multi-color pattern invisible to the naked eye but visible under the light of an Ultraviolet (UV) ray reader and the complexity of the graphic of which prevents any reproduction of the document via photocopying, photography or scanning.

7. Unforgeable standalone seal with several levels of crypto-fiduciary security for securing documents according to the preceding claims, characterized in that it comprises a code of fifteen (15) alphanumeric characters, said code is encrypted and invisible to the naked eye, said code can be visible under the light of an Ultraviolet (UV) ray reader and the encoding of which serves as an access path to a stamp order certificate.

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