This paper discusses the need for intellectual preservation which addresses the integrity and authenticity of information as originally recorded. This need arises with the advent of digital information where an identical copy can be quickly made with an undetectable change. The problem which confronts any user of an electronic document is how the reader can be sure that the document being used is the one intended. There are three possibilities of change in electronic texts: accidental change, intended change that is well-meant, and fraudulent change. The report identifies the potential solution for intellectual preservation as digital time-stamping which calls upon the technique of hashing and the concept of the "widely witnessed event." Regardless of what solution is used, libraries must identify some method to ensure the authenticity of electronic resources. (JLB)