GPO’s Authentication initiative focuses on the primary objective of assuring users that the information made available by GPO is official and authentic and that trust relationships exist between all participants in electronic transactions. In furthering GPO’s mission to provide permanent public access to authentic U.S. Government publications, GPO is working to afford users further assurance that files are unchanged since GPO authenticated them.Find full information on the Authenticated Public and Private Laws: Main Page. Additional general information is available on the Government Printing Office Authentication site.
Georgetown Law Library Blog
Authenticating Electronic Government Documents
October 30, 2007 · Roger Skalbeck
The U.S. Government Printing office has begun a pilot (beta) program to authenticate public and private laws from the 110th Congress (2007-2008). Here's a note about this from their site: