Keep on Blockin’ in the Free World

I am here today to talk about some of the security implications of Radio Frequency Identification. RFID tags are remotely-powered data carriers that resemble the theft control tags that you might find in a sweater when buying clothing from a store. Like theft-control tags, RFID tags are powered and accessed from a distance using radio waves, but RFID tags differ from theft-control tags in that they tend to have more storage space and processing power. RFID tags have security issues that have been exposed in the past few years. The heart of the problem is that RFID tags don’t usually support cryptography, plus RFID application scenarios are usually not conducive to commonly performed security operations like key management; in fact, many security and privacy issues that generally exist in ubiquitous computing reappear in RFID applications specifically

Interface-based hierarchy for synchronous data-flow graphs

International audienceDataflow has proven to be an attractive computation model for programming digital signal processing (DSP) applications. A restricted version of dataflow, termed synchronous dataflow (SDF), offers strong compile-time predictability properties, but has limited expressive power. In this paper we propose a new type of hierarchy in the SDF domain allowing more expressivity while maintaining its predictability. This new hierarchy semantic is based on interfaces that fix the number of tokens consumed/produced by a hierarchical vertex in a manner that is independent or separate from the specified internal dataflow structure of the encapsulated subsystem. This interface-based hierarchy gives the application designer more flexibility in iterative construction of hierarchical representations, and experimentation with different optimization choices at different levels of the design hierarchy

Prospectus, February 25, 1972

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41. Introduction to HTML

At the end of this chapter and the practice activities, readers will be able to: Goal 1: define HTML and identify what it stands for Goal 2: build a simple web page using HTML coding Objective 1: identify and use common HTML tags Objective 2: explain and apply basic tag rules Objective 3: explain attributes and use them to stylize text and images Objective 4: embed videos and other embeddable items into HTML web pages Goal 3: identify websites where readers can learn more and practice their HTML skill

Multi-Core Code Generation From Interface Based Hierarchy

International audienceDataflow has proved to be an attractive computational model for programming digital signal processing (DSP) applications. A restricted version of dataflow, termed synchronous dataflow (SDF), offers strong compile-time predictability properties, but has limited expressive power. A new type of hierarchy semantics that we propose for the SDF model allows more expressivity in SDF while maintaining its predictability. This new hierarchy semantic is based on interfaces that fix the number of tokens consumed/produced by a hierarchical vertex in a manner that is independent or separate from the specified internal dataflow structure of the encapsulated subsystem. This interface-based hierarchy gives the application designer more flexibility to apply iterative design approaches, and to make optimizing choices at the design level. This type of hierarchy is also closer to the host language semantics (i.e., the the semantics of the languages, such as C, Java and Verilog/VHDL, in which the internal functionality of primitive SDF blocks is typically written) because hierarchy levels can be interpreted as code closures (i.e., semantic boundaries), and allow one to design iterative patterns. This paper presents our proposed approach to hierarchical SDF system design, and demonstrates how we can take advantage of the proposed hierarchy semantics to generate efficient static C code targeting embedded applications