on extensions of type systems, and history-based access control. In general, security checks are crosscutting concerns and are hard to modularize. The paper describes how most of existing methods can be implemented in a more modular and evolutionfriendly fashion with the help of aspect-oriented techniques

Abstract: It is important to differentiate between various objects and places in the real world. Any Smartphone equipped with a camera can read the content of QR code directly. QR codes being a two dimensional codes are useful in storing the information.This information isn’t present in human readable form hence an individual cannot anticipate whether this is a valid information or a maliciously manipulated code. QR Codes can be used for attacking both the human interaction and the automated systems. While the humans may fall for various phishing attacks, the automated systems are vulnerable to command injections and SQL injection. This paper examines the QR codes different attacks. Though it is easy to modify the information stored in the QR code but one must make sure that the identifier written in the QR code is issued by an authorized organization.

Mobile devices evolution and revolution:

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As sensor networks edge closer towards wide-spread deployment, security issues become a central concern. So far, the main research focus has been on making sensor networks feasible and useful, and less emphasis was placed on security. We design a suite of security building blocks that are optimized

involve hundreds of processes that must be able to acquire resources dynamically and communicate e#ciently. This paper analyzes the unique security requirements of large-scale distributed (grid) computing and develops a security policy and a corresponding security architecture. An implementation

Current standard security practices do not provide substantial assurance that the end-to-end behavior of a computing system satisfies important security policies such as confidentiality. An end-to-end confidentiality policy might assert that secret input data cannot be inferred by an attacker

This paper gives the main definitions relating to dependability, a generic concept including as special case such attributes as reliability, availability, safety, integrity, maintainability, etc. Security brings in concerns for confidentiality, in addition to availability and integrity. Basic

This paper investigates mechanisms that guarantee secure information flow in a computer system. These mechanisms are examined within a mathematical framework suitable for formulating the requirements of secure information flow among security classes. The central component of the model is a lattice