Author: Andrew Appel
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No Warrant Necessary to Seize Your Laptop
The U.S. Customs may search your laptop and copy your hard drive when you cross the border, according to their policy. They may do this even if they have no particularized suspicion of wrongdoing on your part. They claim that the Fourth Amendment protection against warrantless search and seizure does not apply. The Customs justifies…
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Intractability of Financial Derivatives
A new result by Princeton computer scientists and economists shows a striking application of computer science theory to the field of financial derivative design. The paper is Computational Complexity and Information Asymmetry in Financial Products by Sanjeev Arora, Boaz Barak, Markus Brunnermeier, and Rong Ge. Although computation has long been used in the financial industry…
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Thoughtcrime Experiments
Cosmic rays can flip bits in memory cells or processor datapaths. Once upon a time, Sudhakar and I asked the question, “can an attacker exploit rare and random bit-flips to bypass a programming-language’s type protections and thereby break out of the Java sandbox?” A recently published science-fiction anthology Thoughtcrime Experiments contains a story, “Single-Bit Error”…
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NJ Voting-machine Trial: Defense Witnesses
I’ve previously summarized my own testimony and other plaintiffs’ witnesses’ testimony in the New Jersey voting machines trial, Gusciora v. Corzine. The defendant is the State of New Jersey (Governor and Secretary of State). The defense case comprised the following witnesses: Defense witness James Clayton, the Ocean County voting machine warehouse supervisor, is a well-intentioned…
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NJ Voting-machine trial: Plaintiffs' witnesses
Both sides in the NJ voting-machines lawsuit, Gusciora v. Corzine, have finished presenting their witnesses. Briefs (in which each side presents proposed conclusions) are due June 15 (plaintiffs) and July 15 (defendants), then the Court will eventually issue a decision. In summary, the plaintiffs argue that New Jersey’s voting machines (Sequoia AVC Advantage) can’t be…
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NJ Voting-machine trial update
Earlier this month I testified in Gusciora v. Corzine, the trial in which the plaintiffs argue that New Jersey’s voting machines (Sequoia AVC Advantage) can’t be trusted to count the votes, because they’re so easily hacked to make them cheat. I’ve previously written about the conclusions of my expert report: in 7 minutes you can…
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Optical-scan voting extremely accurate in Minnesota
The recount of the 2008 Minnesota Senate race gives us an opportunity to evaluate the accuracy of precinct-count optical-scan voting. Though there have been contentious disputes over which absentee ballot envelopes to open, the core technology for scanning ballots has proved to be extremely accurate. The votes were counted by machine (except for part of…
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Security Seals on AVC Advantage Voting Machines are Easily Defeated
On September 2, 2008, I submitted a report to the New Jersey Superior Court, demonstrating that the DRE voting machines used in New Jersey are insecure: it is easy to replace the vote-counting program with one that fraudulently shifts votes from one candidate to another. In Section 10 of my report, I explained that There…
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Voting Machines are Silent in Princeton Today
In my recent report on the Sequoia AVC Advantage DRE voting machine, I explained (in Section 32) that the AVC Advantage makes a chirping sound when the pollworker activates the machine to accept a vote, and makes the sound again when the voter presses the CAST VOTE button. In important purpose of this sound is…
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Louisiana Re-enfranchises Independent Voters
Two weeks ago I wrote that independent voters were disenfranchised in the Louisiana Congressional primaries: unclear or incorrect instructions by the Secretary of State to the pollworkers caused thousands of independent voters to be incorrectly precluded from voting in the open Democratic primary on October 4th. Today I am told that Secretary of State Jay…