We propose a protocol to issue a redacted document from an original and authenticated document. The client could ask the document issuer to edit a new redacted and signed version of the original document but this reveals which information is sensitive and thus is a privacy loss. Still, a problem remains: if the user makes redaction on a signed document, the signature cannot be verified with the new modified document. In this paper, we argue that documents digitization opens the possibility to use cryptographic techniques such as signature to guarantee integrity and authenticity of the document issued by the trusted provider. However, the bill can also mention the name of the partner, which has no connection with the original request.Įven if removing the sensitive information from the document looks as a natural and efficient solution to our problematic, service providers fear fraudulent document forgery and often ask to bring the original document. ![]() an electricity bill) where his name is written. In some countries, for the issuance of documents like driver license or identity card, an individual has to prove his place of residence with a bill (e.g. Someone can prove he has earnings by providing the balance of his bank statement (in order to get a visa for instance) but the detail of all the transactions written in the statement does not concern the entity needing a revenue justification, Giving a pay stub to justify employment indeed gives the name and address of the employer but also reveals a sensitive and useless information for this goal, namely the salary amount, To illustrate the relevance of the latter problem, we below give some examples where a document contains private information useless for the required justification: The problem addressed in this paper is to determine whether it is possible to keep sensitive information private on a document while giving a third party assurance that the redacted document was built from an authentic one. Nevertheless, these documents might contain private information that the owner does not want to share with the service provider asking for a justification. They can provide a document, called a breeder document, which will be accepted as a proof as long as the document provider is trusted by the service which needs the paper. ![]() People are frequently asked for information such as their place of residence, a source of income or a proof of employment in order to get e.g.
0 Comments
Leave a Reply. |