digital watermark "material and electricity integration" information seal anti-counterfeiting traceability system platform was successfully developed and constructed

      Recently, three criminals forged the old godmother's seal to defraud Tencent. In fact, as early as 2000, the Ministry of Public Security stated that it would build a national seal security management information system to improve the ability to prevent, detect and combat the use of forged seals to commit crimes. However, the problem of counterfeit seals has not been eradicated.  

      In our country, due to various reasons such as history, traditional habits and social laws and regulations, the symbol of the recognition of affairs is mainly printed (sealed) and supplemented by signatures, which plays an important role in long-term social activities. Since the reform and opening up, the country's economic operation mode has shifted from a planned economy to a market economy, and the seals and seals marking economic activities have the dual characteristics of rights and wealth, and are important certificates for controlling and marking economic rights and exchanging materials or currency.

      Therefore, in order to misappropriate power and seek wealth, criminals and gangs at home and abroad have taken advantage of loopholes in the management of the seal industry and defects in the process and technology of seal production to wantonly forge the seals of administrative organs at all levels, customs, taxation, public security and other law enforcement departments, banking, insurance and other financial departments, enterprises and institutions, disrupt social and public order, disrupt the normal operation of economic activities, and cause major economic losses to the state, society and individuals.

      In order to prevent and combat the criminal activities of forging seals and seals, although China's seal production and management departments have adopted multiple means to prevent them, their relevant means can only basically meet the requirements of preventing manual forgery of seals, and cannot effectively prevent the use of advanced technical means such as scanning and photographing computer correction plate making or laser phototypesetting to forge seals and seals.

      With the formal implementation of the Electronic Signature Law of the People's Republic of China, which gives electronic signatures the same legal effect as text signatures, electronic signatures came into being, providing efficient, convenient and low-cost technical support for e-government and e-commerce in a digital and networked environment. However, with the rapid development and popularization of high-definition scanners, smart phone photography and color printing and copying technology, illegal and criminal activities such as copying, duplication, abuse and embezzlement of electronic seals and their legal documents have become rampant, which poses more severe challenges to the management of electronic seals.

      The purpose of the research and development of the digital watermark "integration of material and electricity" informationized seal anti-counterfeiting traceability system is to ensure the legal, safe and efficient operation of government affairs and business activities in the physical and digital environment, effectively identify and combat the use of high-tech means to privately engrave and steal physical seals, copy, reproduce, abuse electronic seals forge and tamper with legal documents, and provide a safe, reliable, fast and efficient, accurate identification of physical and criminal activities. Anti-counterfeiting identification system for electronic seals and their legal documents.

      The outstanding advantages of the system are: first, the use of digital watermark technology as the core information hiding technology, the digital watermark information embedded and hidden in the physical seal, electronic impression, with a strong anti-counterfeiting traceability function. The second is the digital watermark "integration of material and electricity" information seal processing system, which can realize the physical preservation of the digital watermark of the physical seal, and has a high degree of consistency and uniqueness between the electronic impression and the physical impression. Multiple digital watermark embedding can be carried out in the process of seal making, electronic seal use, seal filing, and to obtain the hidden digital watermark information from the carrier, even if high-definition scanning, copying, smartphone photography, laser phototypesetting and other advanced technical means can not be completed, must be by the digital watermark seal filing, inspection, certification subsystem of the background server of the invention, through its digital watermark authentication module to extract and restore the hidden digital watermark information can be realized. Third, in the electronic environment, it can realize the rapid detection and inspection of digital watermarks in stamp molds/electronic impressions. The system can automatically embed digital watermark information such as seal making and seal time, seal making and seal location, seal making and seal equipment number in the seal mold (physical environment) and electronic impression (digital environment) according to user needs, so as to facilitate the use and control of the seal by the seal power holder, and provide the authenticity certification and traceability tracking information of the seal mold and electronic impression for the authoritative seal supervision and appraisal department. Fourth, the system will automatically add a robust digital watermark to the stamp mold/electronic impression, and add a fragile digital watermark to the printing of the stamp mold/electronic impression. Robust digital watermarks are non-modifiable and have features that prevent forgery and tampering; When a file embedded with a fragile digital watermark is tampered with, the digital watermark information it contains is lost. Embedding and hiding these two digital watermarks will provide users with seals, printing information traceability and legally effective evidence functions, effectively protecting the rights and interests of users.