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David Evans (and CS students) A Smorgasbord of Security, a Smattering of Swarm Programming, and.

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Presentation on theme: "David Evans (and CS students) A Smorgasbord of Security, a Smattering of Swarm Programming, and."— Presentation transcript:


2 David Evans (and CS students) A Smorgasbord of Security, a Smattering of Swarm Programming, and Sampling of Static Checking and a Splash of Web Sites University of Virginia Department of Computer Science

3 4 June 2000CS 3902 Menu Security –Dan Rubin: Online Voting Security –Phil Varner: Voting analysis –Jennifer Kahng: User Interfaces for Security Web –Julie Vogelman: Framework for usability experiments –Felipe Huice: biographical server Lightweight Static Analysis –Chris Barker: porting Win32/Unix Programming the Swarm –Ryan Persaud: Swarm Primitives –Adam Trost: Swarming defense for RoboCup

4 4 June 2000CS 3903 Security Projects Dan Rubin: on-line voting Phil Varner: security analysis of Jennifer Kahng: user interfaces for security

5 4 June 2000CS 3904 Remote Online Voting Security Daniel Rubin, Does this look familiar?

6 4 June 2000CS 3905 Remote Online Voting Security Could the Internet save our elections? –Should be more convenient –Should be more accurate (no chads!) Not so fast! –The Internet is not very secure –Hackers could sabotage an election –Everyone doesnt have a computer (or know how to use one) Dan Rubin

7 4 June 2000CS 3906 What Ive learned Internet Voting works in theory, not in practice Too many risks (e.g. AZ had 60 minute downtime, Studco down 90 minutes) Too big of a target for attackers Look for it in the future, not in the Fall Dan Rubin

8 4 June 2000CS 3907 Project Analyze two remote elections Arizona Dem. PrimaryStudent Council Dan Rubin

9 4 June 2000CS 3908 Vote Early, Vote Often, VoteHere: A Security Analysis of VoteHere Phil Varner How can we assess the security of an on-line voting system? the wake of 2000's fiasco, electoral reform bills are on the agenda in nearly every state-Katherine Harris last week recommended that Florida spend $200 million to adopt E-voting-and Adler's company is a hot property. Cisco Systems and Compaq together have given VoteHere $10 million.

10 4 June 2000CS 3909 Project Developed FaSSAMM - Fairly Simple Security Analysis and Modeling Methodology Combines several analysis tools - attack trees, attackers, abuse cases Used this to analyze VoteHere for security vulnerabilities Created an easy to understand, easy extensible description of security problems Phil Varner

11 4 June 2000CS Results Found the methodology development was more interesting than the actual analysis Found numerous security vulnerabilities (as expected) Didnt find anything revolutionary, but developed a methodology and applied it to a real system Phil Varner

12 Do you want to erase your hard-drive and launch a denial-of-service attack on the NSA?

13 4 June 2000CS Does Everyone Always Click Ok? Jennifer Kahng Anecdotal Evidence (and preliminary experiment on CS110 students) that almost everyone always clicks Ok to almost everything Can we measure this? Can we design dialog boxes that are less prone to auto-clicking?

14 4 June 2000CS Project (or How Jen Annoyed People) Put fake security messages on the Oracle of Bacons Star Links page –4 different looking messages over 4 days –Messages deviated from standard messages as days progressed –Several hundred visitors saw each message Jennifer Kahng

15 animated Jennifer Kahng 31 % clicked Continue 37 % clicked Continue 31.1 % clicked Continue 2% typed in yes

16 4 June 2000CS Conclusions People are stupid Jennifer Kahng Getting people to pay attention is difficult unless you really want to make them angry. Even sysadmins always click Ok Only two people (of > 700) ed the webmaster about potential security vulnerability.

17 Web Projects Julie Vogelman: Framework for Web Site Analysis Felipe Huice: Biographical Database Server

18 4 June 2000CS Web Site Analysis Framework l How should we decide if one web site design is better than another? l Many books written on this topic, but they are written by artists (subjective and contradictory) l Can we answer design questions quantitatively? What is the most readable type and size of a font on a web page? Arial? Times New Roman? How much white space is needed? How much is too much bold for text? Julie Vogelman

19 4 June 2000CS Framework Version 2 Version 1 Log Files Web Analysis Tool Web Server Julie Vogelman Modified apache web server to randomly deliver different versions of site. Analyze the log files to see how visitors react differently.

20 4 June 2000CS Experiments CS110 Volunteers –Had a directed task –How quickly could they accomplish it? (Did it depend on the site design.) –Small sample, hard to make conclusions Web visitors to LCLint site –Hard to judge what their goals are (is it better if they click on the wrong link more quickly?) –Thousands of visitors Julie Vogelman

21 4 June 2000CS Personal Information Database Most people (Computer Science Graduate students) are too lazy to make and update personal web pages –Too much work –Not enough benefit Can we make it less work and more benefit? –Solution: automatic creation of home pages from personal information files (.plan files) Felipe Huice

22 4 June 2000CS Design Description Scripts populate database from.plan files PHP scripts provide search capabilities and displays the home pages Felipe Huice

23 4 June 2000CS Advantages Any CS Graduate student can have a home page created in 1 or 2 minutes Searches that currently could take hours can be done in a minute Anyone with access to the Internet can view the information Felipe Huice

24 Lightweight Static Analysis Chris Barker: Porting UNIX/Windows

25 4 June 2000CS A Gross Oversimplification Effort Required Low Unfathomable Formal Verifiers Bugs Detected none all Compilers LCLint

26 4 June 2000CS Shift from UNIX to Windows PCs running Microsoft products have grown increasingly popular. Software companies are feeling a market demand to offer their products on WIN32 systems. Porting software from UNIX to WIN32 often results in bugs in the ported code. Chris Barker

27 4 June 2000CS The Search for the Bugs Researched past ports to create a list of porting issues –Priority values mean opposite things –Treatment of files and sockets, unsafe calls, etc. Created annotations in LCLint to find these bugs using –Warn on Use –Variable States –Global States Verified that LCLint could find these issues in a real application Chris Barker

28 Programming the Swarm Ryan Persaud: Swarm Primitives Adam Trost: Swarming Defense

29 4 June 2000CS Programming the Swarm: Long-Range Goal Cement 10 GFlop

30 4 June 2000CS Whats Changing Execution Platforms –Not computers (98% of processors sold this year) –Small and cheap Execution environment –Interact with physical world –Unpredictable, dynamic Programs –Old style of programming wont work –Is there a new paradigm?

31 4 June 2000CS Swarm Programming Primitives describe group behaviors –What are the primitives? –How are they specified? Important to understand both functional (how the state changes) and non-functional (power use, robustness, efficiency, etc.) properties Construct complex behaviors by composing primitives –Predict behavior of result –Pick the right primitives based on description of desired non-functional properties

32 4 June 2000CS Swarm Primitives Ryan Persaud Initial, Clumped ConfigurationFinal, Dispersed Configuration Ryan Persaud Each bug looks only at its immediate neighbors. Moves randomly if they are too close. How long will it take? How much does communication help?

33 4 June 2000CS Experiments Ryan Persaud

34 4 June 2000CS Swarming Defense Adam Trost Simulate Soccer Defense as a Swarm Program: –Defensive tactics describe desired global properties (e.g., defend the middle in from of the goal well) –Different global properties interact to produce emergent behavior –Synthesize individual player behaviors based on the desired global properties

35 4 June 2000CS RoboCup 2001 Playing simulated soccer games is serious academic stuff - international conference focuses on cooperation between autonomous agents in dynamic multiagent environments Soccer Simulation League –Server acting as the field is a dynamic environment –11 players are the swarm devices Hint: to qualify for RoboCup 2002/Japan, we probably need offense also!

36 4 June 2000CS Summary Your thesis should be your own project –Better to do all of a small project, than a little piece of a big project –Start with a question, not something to implement –Alan Kays Third Law: If you have an idea, and its not a good idea, take a nap instead of implementing it. Ill supervise (almost) anything if you can convince me it is interesting When in doubt, click Ok

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