EditWYSIWYGAttach PDF Raw View►More Actions▼More Actions


Restore topic to revision: You will be able to review the topic before saving it to a new revision

Copy text and form data to a new topic (no attachments will be copied though).
Name of copy:
You will be able to review the copied topic before saving

Rename/move topic... scans links in all public webs (recommended)
Rename/move topic... scans links in CBI_ComputerSecurity web only
Delete topic... scans links in all public webs (recommended)
Delete topic... scans links in CBI_ComputerSecurity web only

Revision Date Username Comment
725 Feb 2014 - 10:08norqu036? 
619 Feb 2014 - 19:48norqu036? 
519 Feb 2014 - 18:41norqu036? 
405 Feb 2014 - 10:30norqu036? 
304 Feb 2014 - 21:47norqu036? 
222 Jan 2014 - 18:47norqu036? 
122 Jan 2014 - 09:51norqu036? 

Render style:     Context:


 History: r7 < r6 < r5 < r4 < r3
[X] Hide this message.
Notice: On June 30, 2016, UMWiki service will be decommissioned. If you have information in UMWIki that needs to be preserved, you should make plans to move it before that date. Google Sites is anticipated to be the most popular and appropriate alternative for users because it offers a more modern and user-friendly interface and unlimited capacity. To learn more about the features of Google Sites and other alternatives, and to identify which one best fits your needs, see the University’s Website Solution Selection Guide. If you have concerns or would like help regarding this change and your options, please contact Technology Help at help@umn.edu
You are here: UMWiki>CBI_ComputerSecurity Web>People>PeopleHellmanMartin (revision 4)

Current Activitieslock Who is Who?lock People Programs Publications CSHW_2014 Systems Events Mechanisms

Martin E. Hellman

Martin Hellman (b. October 2, 1945), currently Professor Emeritus of Electrical Engineering at Stanford University, is best known in the field of computer security for his work on cryptography. At Stanford in the 1970s, Hellman, Whitfield Diffie and Ralph Merkle created the Diffie-Hellman Key Exchange, a method that allows two parties to exchange encrypted information securely over a public channel that has since become the basis for public key cryptography. The exchange was outlined in the 1976 paper "New Directions in Cryptography." Throughout his career Hellman has been an active participant in discussions of ethics and privacy in computer security. Over the course of his career, Hellman has published over seventy papers and registered ten U.S. patents. He has also been the recipient of major awards including the RSA Lifetime Achievement Award. Hellman continued at Stanford, where he served on the regular faculty until becoming Professor Emeritus in 1996.(1)

Hellman received his B.E. from New York University in 1966, and his M.S. and Ph.D. from Stanford University in 1967 and 1969, all in Electrical Engineering. Worked briefly at IBM's Watson Research Center from 1968-69 and then as an Assistant Professor of Electrical Engineering at MIT from 1969-71. In 1971 he returned to Stanford and joined the Electrical Engineering faculty. Hellman met Whitfield Diffie in 1975 while Diffie was on a research trip. Hellman and Diffie shared a frustration at the fact that most of the significant research in cryptography was taking place at the National Security Agency where it was inaccessible to to most scientists and engineers. Together with Ralph Merkle, Hellman and Diffie created the concept of the trap door one-way function. Such a function is essentially a mathematical equation that can be solved easily in one direction but not the other. This allows for the creation of a shareable public key and a personal private key and is the system on which the Diffie-Hellman Key Exchange is based.(2)(3)

For a number of years after the publication of "New Directions in Cryptography" and other papers having to do with public key cryptography, there was debate between academic cryptographers and the NSA over whether research on cryptography should be kept confidential for national security reasons. Part of Hellman's drive in developing public key cryptography came from his opinion fact current encryption standards set by the National Bureau of Standards, which called for a fifty-six bit encryption key, and which had been created with guidance from the NSA, were not secure enough. Hellman and Diffie calculated that the NSA or other agencies could break the encryption with an investment on the order of $10,000. The NSA vehemently denied this, and in doing so generated antagonism between themselves and academics such as Hellman and Diffie. This was exacerbated when an NSA employee who was a member of the IEEE sent a letter to the organization which argued that the publishing of papers such as "New Directions in Cryptography" could be in violation of the International Traffic of Arms Regulation, and could thus lead to possible fines or jail time. While no one was ever tried under such circumstances, the antagonism continued through the next several decades, though Hellman in his later career came to see the debate as less black-and-white.(4)

Jeffrey Yost from the Charles Babbage Institute conducted an oral history interview with Martin Hellman (OH 375) on November 22, 2004.

Notes

1 , 2 : http://www-ee.stanford.edu/~hellman/

3 , 4 : http://conservancy.umn.edu/handle/107353


Edit | WYSIWYG | Attach |  PDF |  History: r7 < r6 < r5 < r4 < r3 |  Backlinks |  Raw View | More topic actions...
Topic revision: r4 - 05 Feb 2014 - 10:30:37 - norqu036
 
Signed in as lewi0740 (NicLewis) | Sign out
UMWiki UMWiki
This site is powered by FoswikiCopyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding UMWiki? Send feedback