Multi-user electronic signature method for CAD drawing

Abstract

The invention discloses a CAD drawing multi-user electronic signature method, which comprises the following steps: initiating CAD drawing signature to obtain a CAD drawing with a signature certificateand a timestamp; filing the CAD drawing with the signature certificate and the timestamp, and informing each signature user to sign; and after the signature user receives the CAD drawing, carrying out signature verification (judging whether the current drawing is tampered in a circulation process), and enabling the user to carry out electronic signature. According to the scheme of the invention,a plurality of signers can sign own electronic seals (signature handwriting) and signature timestamps at specified positions on a CAD drawing, and attach own signature certificates and timestamps to the drawing; multi-user signature is effective, and drawing information seen by a plurality of signature backbone persons before signature can be consistent; and the user can see the signer and the signing time on the signing list of the drawing and can also check the signer and the signing time through a visual method.

Description

technical field [0001] The invention relates to the technical field of CAD electronic signatures, in particular to a method for multi-user electronic signatures of CAD drawings. Background technique [0002] CAD computer-aided design (Computer Aided Design) refers to the use of computers and graphics equipment to help designers design, draw, and engineering calculations; at the same time, it can analyze and compare design elements to determine the optimal solution. The earliest application of CAD was in large companies in the automobile manufacturing, aerospace and electronics industries. Later, it was applied to architectural majors (building structure, interior decoration), structural majors (pile position diagrams, basement structural diagrams), electrical majors, water supply and drainage majors, HVAC, etc. [0003] At present, the CAD drawing software on the market is mainly Autodesk's AutoCAD, which has powerful functions, strong expandability, and wide application, a...

AI Technical Summary

Problems solved by technology

[0007] 2. However, AutoCAD's built-in electronic signature only supports single user certificate signature. If multiple users sign, only the last signature will be kept, and multi-user certificate signature is not supported.

[0008] 3. AutoCAD also does not support multiple users inserting their own signature handwriting (seal) and signing time in the signing form, because for CAD drawings, inserting the user's signature and time has already tampered with the drawing

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