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Accounting Office (GAO) disclosed that approximately 250,000 break-ins into Federal computer systems were attempted over the previous year. At least 10 major agencies, comprising 98% of the total Federal budget, had been attacked. The GAO went on to say that an estimated 64% of these attacks (about 160,000) were successful. It gets worse: the number of(More)
Spam and phishing emails are not only annoying to users, but are a real threat to inter-net communication and web economy. The fight against unwanted emails has become a cat-and-mouse game between criminals and people trying to develop techniques for detecting such unwanted emails. Criminals are constantly developing new tricks and adopt the ones that make(More)
  • Brian Witten
  • 2006
We propose an architecture of four complimentary technologies increasingly relevant to a growing number of home users and organizations: cryptography, separation kernels, formal verification, and rapidly improving techniques relevant to software defect density estimation. Cryptographic separation protects information in transmission and storage. Formally(More)
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