An electronic signature method of a PDF file and a signature verification method of the electronic signature
An electronic signature and document technology, which is applied in the fields of information security and cryptography, can solve the problems of large number of signatures, difficulty in realization, unacceptable time spent, etc., and achieve the effect of improving signature verification efficiency, preventing document tampering, and improving signature efficiency
Inactive Publication Date: 2019-05-31
TIANGU INFORMATION SCI TECH HANGZHOU
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Problems solved by technology
In this case, it is impossible to achieve with existing technology
In addition to technical limitations, the time spent on signing will also become unacceptable, and it will become difficult to verify the signature due to the large number of signatures
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[0017] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.
[0018] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the compo...
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The invention provides an electronic signature method of a PDF file and a signature verification method of the electronic signature. The signature method comprises the following steps: obtaining identity information of each signer and assembling the identity information into an identity original text; adopting a Hash algorithm to carry out abstract operation on the identity original text; applyinga digital certificate to a third-party digital authentication mechanism according to an abstract result generated by the abstract operation; and capping an electronic signature at a designated position of the PDF file according to the digital certificate and the digital signature technology. The signature verification method comprises the steps that after electronic signature verification of a PDF file is passed, a first abstract result of a digital certificate of the PDF file is checked; obtaining identity information of each signer and assembling the identity information into an identity original text; carrying out abstract operation on the identity original text by adopting a Hash algorithm to obtain a second abstract result; judging whether the first abstract result and the second abstract result are consistent or not, and determining whether the to-be-verified person is an original signer or not according to the judgment result. According to the invention, the limitation of the number of PDF electronic signatures is broken, and the signature and signature verification efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of encryption in the field of information security, in particular to an electronic signature method of a PDF file and a verification method of the electronic signature. Background technique [0002] Electronic signature technology is based on the realization of digital signature by digital certificate, adding seal technology to express the meaning of digital signature. The core of the electronic signature technology is the digital signature technology based on the digital certificate, which uniquely identifies the signer through the digital certificate, so as to achieve the effect of non-repudiation. The so-called digital certificate is issued by a third-party digital certification center (referred to as CA center) licensed by the state and issued to natural persons and legal persons in the real world to prove the identity of the digital certificate holder on the network. [0003] At present, the vast major...
Claims
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Inventor 程亮蒋淑红郭峰李方翔
Owner TIANGU INFORMATION SCI TECH HANGZHOU