The miniaturization of micro-fluidic chemical assays of fluid mixtures containing particles such as biological molecules and cells is a technically and commercially significant objective. Successful automation of chemical analysis of small samples requires seamless integration of several subsystems that perform tasks routinely carried out by a skilled technician. In this paper is presented a me...

The annotated streaming model was originally introduced by Chakrabarti, Cormode and McGregor [ICALP 09]. In this extension of the conventional streaming model, a single query on the stream has to be answered by a client with the help from an untrusted annotator that provides an annotated data stream (to be used with the input stream). Only one-way communication is allowed. We extend the model b...

Many important applications require a continuous computation of statistics over data streams. Activities monitoring, surveillance and fraud detections are some settings where it is crucial for the monitoring applications to protect user’s sensitive information in addition to efficiently compute the required statistics. In the last two decades, a broad range of techniques for time-series and str...

The burstiness of a traffic stream can have a profound effect on performance statistics in the queue to which the stream is offered, such as line length, waiting times and blocking probabilities. Mathematical descriptors quantifying burstiness should be versatile enough to characterize burstiness, yet analytically tractable to permit numerical calculation. This paper surveys two important descr...

LSB steganography is one of the popular ways of message embedding in different multimedia cover objects. A number of commercial steganography software tools use LSB insertion as a method of message packing. In the present work the detailed study has been made regarding the stochastic properties of the embedded message and LSB pattern in colour and gray scale images. The influence of the initial...

Sequence compression is one of the most promising tools for strengthening pseudo-random generators used in stream ciphers. Indeed, adding compression components can thwart algebraic attacks aimed at LFSR-based stream ciphers. Among such components are the Shrinking Generator and the Self-Shrinking Generator, as well as recent variations on Bit-Search-based decimation. We propose a general model...

We study the problem of finding frequent items in a continuous stream of itemsets. A new frequency measure is introduced, based on a flexible window length. For a given item, its current frequency in the stream is defined as the maximal frequency over all windows from any point in the past until the current state. We study the properties of the new measure, and propose an incremental algorithm ...