Neal H. Walfield

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The GNU Hurd's design was motivated by a desire to rectify a number of observed shortcomings in Unix. Foremost among these is that many policies that limit users exist simply as remnants of the design of the system's mechanisms and their implementation. To increase extensibility and integration, the Hurd adopts an object-based architecture and defines(More)
We present a storage management framework for Web 2.0 services that places users back in control of their data. Current Web services complicate data management due to data lock-in and lack usable protection mechanisms, which makes cross-service sharing risky. Our framework allows multiple Web services shared access to a single copy of data that resides on a(More)
We present the design and implementation of a trust-on-first-use (TOFU) policy for OpenPGP. When an OpenPGP user verifies a signature, TOFU checks that the signer used the same key as in the past. If not, this is a strong indicator that a key is a forgery and either the message is also a forgery or an active man-in-the-middle attack (MitM) is or was(More)
This paper provides insights into human mobility by analyzing cell tower traces. Cell tower trace data is an attractive method for studying mobility as the data can be collected in an energy-efficient and privacy-preserving way. Our new data set is useful for confirming or determining fundamental mobility parameters and for understanding mobile networks. In(More)
<lb>A quFile is a unifying abstraction that simplifies data<lb>management by encapsulating different physical repre-<lb>sentations of the same logical data. Similar to a quBit<lb>(quantum bit), the particular representation of the logi-<lb>cal data displayed by a quFile is not determined until the<lb>moment it is needed. The representation returned by(More)
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