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BlueCat is a Linux-based operating system for 64-bits processors.

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How to install, update and other things with package managers in Linux?

Package managers are tools to automate the process of installing, upgrading, uninstalling or configuring software on Linux. Package managers are part of the operating system and they use a single database for installation and a single packet format, for example: rpm or deb. They are also responsible for checking the digital signature, and dependency resolution for updates.
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AES (Advanced Encryption Standard) overview: Part II

In Part I of the Overview of AES (Advanced Encryption Standard) the most relevant aspects of AES and S-Box was described. Now, we discuss some details of the so-called transformations (ByteSub, ShiftRow, MixColumns and AddRoundKey) and the subkey generation process. To see more details in a more dynamic way the Rijndael Animation application is recommended.   ByteSub This transformation performs a byte-by-byte substitution in each of the state matrix elements, ie, the state matrix [aij] is replaced by the matrix [Sij], Figure # 1 shows this process. Using Rijndael Animation [1] application, it can be seen as the first byte…
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AES (Advanced Encryption Standard) Overview: Part I

The AES (Advanced Encryption Standard) algorithm [1], known as Rijndael, was so-named by its creators Joan Daemen and Vincent Rijmen, it is the current international standard for communications encryption since october 2000. This algorithm is characterized by a symmetric block cipher with variable key length, the default key length is 128 bits but can also be set to 192 or 256 bits.
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Quality of Service end-to-end in femto-cells environments

The telecommunications network of an ISP (Internet Service Provider) is actually an interaction of various networks types, within LTE (4G) can be highlighted as an access network to the end user. The information flow reaches to the user through several infrastructures, on which the ISP carries data traffic, from this perspective, some necessary points will be discussed in order to ensure the Quality of Service (QoS) in such environments. From the point of view of LTE management, it is permitted to define profiles and classes of services, which are key points when negotiating QoS mobile requirements during the communication establishment,…
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