Informatic

Organizations have desired to keep certain sensitive communications and information secret for years. In our new age of digital media and internet communications, this need often seems even more pressing.

Today’s information age, were technology has made information sharing and transfer  increased exponentially and also making the information vulnerable to unauthorized access, use, modification and interception both while in storage or in transmission.

It is no surprise that countless encryption methods of protecting such information like cryptography, water marking and many more have evolved.

One lesser- known but rapidly growing encryption method is Steganography. Though steganography is an ancient craft, the onset of computer technology has given it new life.

Computer-based stenographic techniques introduce changes to digital covers such as Image, Audio and Video.

Muchos números naturales de base 10 consisten en múltiples números 1 y 0. Por ejemplo el número once 11, el diez 10 el ciento uno 101. Dado un numero X se desea conocer cuál es el múltiplo más pequeño de X que puede formarse exclusivamente de unos y ceros. Si X = 55, entonces el múltiplo más pequeño que podemos formar con unos y ceros es 110. Entrada La primea línea indica el número de casos, las siguientes líneas indican cada uno de los casos. Salida Cada línea es el resultado del número formado por unos y ceros más pequeño que es múltiplo de X.

The article aims at defining the current situation of the Cuban Press websites regarding their optimization for Search Engine Optimization. This article derives from an assessment carried out to some national websites, through observation and data compilation related to several key elements. By analyzing the data obtained, the condition of the Search Engine Optimization in the portals and web positioning in search engines, are determined. A set of possible causes for the current deficiencies, which might constitute the basis for the conception of methodological strategies to improve portal optimization if required, is also presented.

Abstract In this paper, we study the influence of QoS pricing strategy in the future QoS Internet market. We create a Bertrand duopoly game model with different pricing schemes: one ISP with flat rate pricing for its QoS service and the other ISP with two part tariff, a combined pricing scheme with flat rate and usage-sensitive pricing. Based on industry survey data, we conduct a simulation of a random number generation method for consumer demand and Internet access hours.

Abstract This paper provides an in-depth analysis of technological and market issues that will impact the development of bandwidth trading markets with liquidity. We provide a very broad definition for a bandwidth trading agreement and we analyze several network topologies in which trading bandwidth would make sense both from a business perspective and a technical perspective.