Protecting digital documents and being able to verify that the sender of a file is, in fact, who they say they are, is fast becoming a major concern for many businesses.
Whether receiving a document from a business partner, or downloading software from the Internet, the ability to verify the integrity of a file is crucial. Documents that have been tampered with, or created fraudulently, pose a serious threat. A good protection strategy is the use of a digital signature. This is a mathematical scheme for demonstrating the authenticity of a digital file.
The recipient of a document has reason to believe a known sender created it, and prevents them from denying sending it, this is known as authentication and non-repudiation. Like a tamper-proof seal, it indicates that the document was not altered during delivery, its integrity was in tact.