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(continued...) By typing in a user name a finger print simply needs to be validated rather than searched through the full user database making the process very rapid.
Any drawing user with the verifier software can subsequently validate these files.
Since the ability to distribute drawings electronically is an important benefit of CADsign, the verifier is available as a free reader that can be supplied to any drawing recipients.
This process offers every drawing user the assurance that they are working with the approved drawing since any changes to drawing entities automatically removes the approved by signatures from the drawing sheet.
Significantly support also extends to checking Xrefs for modifications and all signing or 'un-signing' events are logged in the signature history, creating a full audit trail with approvers able to add comments if required.
Originators signatures can be locked so that they remain on the drawing.
An alternative approach offered by Document Flow is the Secure Collaboration Tool that runs inside AutoCAD.
This allows specific areas of a drawing to be secured by password.
Other users can work from this data and add additional entities but without the SCT software and associated password and public key cannot edit the protected data.
For situations where non-AutoCAD data also needs to be secured, Filesign is available.