Digital signature method and system

Abstract

The present invention provides a digital signature method and system, and relates to the field of the safety verification. The method provided by the invention is configured to perform abstract calculation of the transaction information prior to the transaction information display so as to allow a smart terminal and a signature terminal to respectively calculate the feature information of the transaction information and allow the smart terminal and the signature terminal to display the feature information instead of plaintext transaction information. Even though a hacker only modifies little content in the transaction information, the calculated feature information can have great change to allow users to visually and accurately determine that the transaction information is tampered, and the users do not should perform digital signature so as to ensure that the users can timely find that the hacker tampers the transaction information and cannot have loss.

Description

technical field [0001] The invention relates to the field of security verification, in particular to a digital signature method and system. Background technique [0002] With the development of Internet technology, electronic information interaction technology has been popularized. From the perspective of information content, the transmitted information can be divided into two types, one type is information expressing a certain meaning, and the other type is funds. No matter what kind of information interaction, before the information interaction, the confirmation of the information provider is usually required to ensure the information security of the information provider. When information is exchanged, virtual information (data) is transmitted, and the confirmation of the information provider is realized through digital signature. The general digital signature process is as follows: [0003] 1. Smart devices (such as user mobile phones) receive / generate transaction info...

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Problems solved by technology

[0010] However, there are certain loopholes in the above process. For example, a hacker can implant a Trojan horse program into the smart device. Then, the information displayed in step 2 is still normal information. The content sent to the digital signature device has been tampered with, but usually there is little tampered content, such as small-scale tampering such as changing the address information "ABCD" to "ABCB", and the symbols before and after the tampering are very similar, and it is usually difficult for users to Noticing such a small change, and then, after confirming it through a digital signature device, transfers funds to the wrong person

[0011] In summary, due to the fact that the current signature process is not rigorous enough when performing digital signatures, it leads to transaction errors

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