There are probably hundreds or even thousands of requirements for Document Protection in one form or another. All need protection in one or more of the 4 areas:

Content, Origin, Uniqueness and Ownership.

Codel protects each factor the same way - by storing a time stamped record with a hash value representing each protected element.

How this works with different document types is explained in the EXAMPLES you can see here.

Click here for our Codel Document Protection Software