Theory and Practice of Cryptography

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Google Tech Talks
December, 19 2007

Topics include: Introduction to Modern Cryptography, Using Cryptography in Practice and at Google, Proofs of Security and Security Definitions and A Special Topic in Cryptography

This talk is one in a series hosted by Google University: Wednesdays, 11/28/07 - 12/19/07 from 1-2pm

Speaker: Steve Weis
Steve Weis received his PhD from the Cryptography and Information Security group at MIT, where he was advised by Ron Rivest. He is a member of Google's Applied Security (AppSec) team and is the technical lead for Google's internal cryptographic library, KeyMaster.

Channel: People & Blogs
Uploaded: December 21, 2007 at 12:12 pm
Author: googletechtalks

Length: 01:32:06
Rating: 4.77
Views: 11449

Tags: google techtalks techtalk engedu talk talks googletechtalks education

Video Comments:
MageFX (October 16, 2008 at 8:33 pm)
i need someone to likc my pussy h
07904662391 (October 15, 2008 at 8:31 pm)
g i want some sexy subscribers! w
jr3470 (August 28, 2008 at 6:06 am)
my friend that's 15 wrote it in LSL language o_o and i still don't really know what it is just something that hides your password
StephenWeis (August 22, 2008 at 9:33 pm)
As a follow up, Ben has built his voter-verifiable voting system on the web. Look for Helios Voting.
polarbear60 (June 23, 2008 at 1:15 am)
You asshole! You are talking about voting and you have a preference? Where is your integrity!!!
kimshepherd (January 10, 2008 at 7:12 am)
Excellent video, way better than hearing about Alice and Bob and Eve again... great examples, great ideas, great explanations.
AllAboutVoting (December 29, 2007 at 1:58 am)
I really enjoyed this talk.
StephenWeis (December 26, 2007 at 11:01 am)
Excellent talk.
kimshepherd (January 10, 2008 at 7:49 am)
:)
Quick question: I wonder whether it would be dangerous to rely on one centralised website or 'bulletin board', to avoid coercers taking over a university or ISP proxy server and fooling many voters into thinking their votes are corrupted...

How important is the bulletin board itself in the overall auditing scheme?
StephenWeis (January 10, 2008 at 9:27 am)
There doesn't have to be one centralized bulletin board. The key property Ben is trying to get at with the bulletin board analogy is that voters can go and check that their encrypted ballot appears in some publicly accessible repository, which may be distributed.

If the vote does not appear, then the voter will have a receipt that they can turn over to an investigative agency.

Denial of service, like in the example you give, is always a risk, but can be detected and prevented.