Method and device for file transmission

Abstract

The invention aims at providing a method and device for file transmission and a system. Compared with the prior art, the method has the advantages that a first signal is generated through adoption ofa service device; when a user device sends a file transmission request, the file transmission request is verified based on the first signal; if the first signal corresponds to a transmitted file, thefile transmission request is rejected, on the contrary, if the first signal does not correspond to the transmitted file, the user device is allowed to carry out the data transmission; the file transmission times is limited through adoption of the first signal; one signal is guaranteed to only correspond to single-time file transmission; a conflict possibly occurring when repeated file uploading iscarried out can be effectively avoided; and moreover, under the condition that a user is allowed to check the uploaded file, the uploaded file is prevented from being checked repeatedly. According tothe method, the device and the system, the file transmission security, reliability and validity can be effectively ensured, and moreover, the use experience of the user is improved.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a file transmission technology. Background technique [0002] At present, Internet services have been able to cover people's various life and work needs. With the continuous expansion of the coverage of Internet services, some Internet services require users to upload qualification documents with authentication properties (such as personal ID cards, business licenses, authorization letters, etc.) to provide corresponding services. [0003] For the transmission of such qualification files, it is necessary to ensure the security during the transmission process, including the security during the upload process and the security during the viewing / display process. However, in the prior art, in the process of uploading, the security of the uploaded file is only ensured by means such as identifying the terminal, and if there are multiple authenticated terminals uploading the same quali...

AI Technical Summary

Problems solved by technology

However, in the prior art, in the process of uploading, the security of the uploaded file is only ensured by means such as identifying the terminal, and if there are multiple authenticated terminals uploading the same qualification file to the server at the same time , it is impossible to determine which terminal is uploading a legal file, and conflicts are likely to occur; in downloading, the user is prohibited from viewing the uploaded file again to prevent illegal elements from obtaining the image again through the image url or other methods. Obviously, this method makes it impossible for users to check and verify the uploaded files again

[0004] Therefore, the file transfer method in the prior art still has certain potential safety hazards for files with special requirements such as qualification files, and at the same time, there is also the defect of sacrificing user experience for safety.

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