DEAL is a sixor eight-round Luby-Rackoff cipher that uses DES as its round function, with allowed key lengths of 128, 192, and 256 bits. In this paper, we discuss two new results on the DEAL key schedule. First, we discuss the existence of equivalent keys for all three key lengths; pairs of equivalent keys in DEAL-128 require about 2 DES encryptions to find, while equivalent keys in DEAL-192 an...

It is very uncommon for manuscripts submitted to peer-reviewed journals to be accepted directly, without a request for revision. Most submitted manuscripts go through a meticulous review process by several reviewers who are experts in the given subject; these reviewers may request major or minor revisions or even reject the manuscript. The revision of a manuscript is a crucial step in the publi...

The past few years have seen a greater recognition of the part that research can play in estimating the need for medical care services, in analysing the ways in which such services actually function, as distinct from the ways in which they are conventionally assumed to function, and in assessing their effects upon patients. Such operational studies have already done a great deal to deepen our u...

Globalization has brought huge overall benefits, but earnings for most U.S. workers -even those with college degrees -have been falling recently; inequality is greater now than at any other time in the last 70 years. Whatever the cause, the result has been a surge in protectionism. To save globalization, policymakers must spread its gains more widely. The best way to do that is by redistributin...

Daily deals sites, such as Groupon and LivingSocial, attract millions of customers in the hunt for products and services at substantially reduced prices (i.e., deals). An important aspect for the profitability of these sites is the correct prediction of how many coupons will be sold for each deal in their catalog—a task commonly referred to as deal size prediction. Existing solutions for the de...