David Tracy on fragments, fragmentation, and frag-events

Fragmentation Considered Vulnerable: Blindly Intercepting and Discarding Fragments

The key to their attack is to determine the IP ID. This is trivial with Windows, which uses a monotonically increasing IP ID. Linux uses a per-destination IP ID, which makes determining the IP ID more difficult. In their attacks, they make use of a sandboxed script, PuZo, on the victim’s network, to watch for fragments that do not show up. The missing fragments must have had a valid IP ID, and ...

Tracy Lerman

Asymptotics for the small fragments of the fragmentation at nodes

Abstract. We consider the fragmentation at nodes of the Lévy continuous random tree introduced in a previous paper. In this framework we compute the asymptotic for the number of small fragments at time θ. This limit is increasing in θ and discontinuous. In the α-stable case the fragmentation is self-similar with index 1/α, with α ∈ (1, 2) and the results are close to those Bertoin obtained for ...

Tracy Morton Sonneborn

Any opinions expressed in this memoir are those of the author(s) and do not necessarily reflect the views of the National Academy of Sciences.

on semihypergroups and hypergroups

in this thesis, first the notion of weak mutual associativity (w.m.a.) and the necessary and sufficient condition for a $(l,gamma)$-associated hypersemigroup $(h, ast)$ derived from some family of $lesssim$-preordered semigroups to be a hypergroup, are given. second, by proving the fact that the concrete categories, semihypergroups and hypergroups have not free objects we will introduce t...