Librarians have been busy in this area. Electronic journals will soon (well, it will take a few years...) become the prefered method for scientific publishing. Pre-publishing, peer-review, certification, post-certification addenda (and sometimes even revocation, if cheating has been proven). Similar methods have been used in the technical development of the Internet for decades but now other fields are catching on. An example of public peer-review techniques http://www.mja.com.au/review/oprtprot.html A functioning and respected scientific e-journal http://www.cogsci.soton.ac.uk/bbs/ The Linkoping University Electronic Press http://www.ep.liu.se/ and more specifically http://www.ida.liu.se/ext/cgi-bin/epa/protect.html describes PGP-signing the MD5 hashes of articles. They will guarantee their on-line survival for 25 years. Also, paper copies are stored in the deep archives of several Swedish University libraries. I guess they don't guarantee that the URL will stay the same for 25 years, but why not. Asgaard