international data encryption algorithm (IDEA) is a secret key or symmetric key block cipher. The purpose of IDEA was to replace dataencryption standard (DES) cipher, which became practically insecure due to its smal...
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international data encryption algorithm (IDEA) is a secret key or symmetric key block cipher. The purpose of IDEA was to replace dataencryption standard (DES) cipher, which became practically insecure due to its small key size of 56 bits and increase in computational power of systems. IDEA cipher mainly to provides data confidentiality in variety of applications such as commercial and financial application e.g. pretty good privacy (PGP) protocol. Till 2015, no successful linear or algebraic weaknesses of IDEA of have been reported. In this paper, author explained IDEA cipher, its application in PGP and did a systematic survey of various attacks attempted on IDEA cipher. The best cryptanalysis result which applied to all keys could break IDEA up to 6 rounds out of 8.5 rounds of the full IDEA cipher(1). But the attack requires 2(64) known plaintexts and 2(126.8) operations for reduced round version. This attack is practically not feasible due to above mentioned mammoth data and time requirements. So IDEA cipher is still completely secure for practical usage. PGP v2.0 uses IDEA cipher in place of BassOmatic which was found to be insecure for providing data confidentiality.
Real-time locating systems (RTLS) enable a number of new important applications. Their performance is mainly limited by wireless propagation impairments. This paper puts forth the idea to enhance coverage and accuracy...
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ISBN:
(纸本)9781467310680
Real-time locating systems (RTLS) enable a number of new important applications. Their performance is mainly limited by wireless propagation impairments. This paper puts forth the idea to enhance coverage and accuracy of RTLS in the presence of severe non line-of-sight propagation conditions using low complexity non-regenerative ultra-wide bandwidth relays. A maximum likelihood position estimator is derived and the feasibility of relay-based positioning scheme is demonstrated.
Smoothing of derivative values which correspond, for example, to the gradient of a finite element method (FEM) solution of a scalar field, is a well-known approach for obtaining an estimate of a higher-order derivativ...
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ISBN:
(纸本)9781479978069
Smoothing of derivative values which correspond, for example, to the gradient of a finite element method (FEM) solution of a scalar field, is a well-known approach for obtaining an estimate of a higher-order derivative. The difference may be used to estimate the error in the derivative or recovery may simply be used as a post-processing tool. Recovery is not a well-explored topic for electromagnetic field integral equation solutions by the Method of Moments (MoM). Recently, a charge recovery procedure for the RWG-based MoM has been introduced. This paper explores the possibility of recovery for the current itself. Recovered current distributions and a posteriori estimated errors based on the recovered values are presented.
The paper presents a new approach, based on an algebraic-logical meta-models (ALMM), to solving NP - hard manufacturing problems. There is considered the flow-shop manufacturing problem with time limits, the quality c...
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ISBN:
(纸本)9781467355087;9781467355063
The paper presents a new approach, based on an algebraic-logical meta-models (ALMM), to solving NP - hard manufacturing problems. There is considered the flow-shop manufacturing problem with time limits, the quality control, removing of manufacturing defects on an additional repair machine and re-treatment of task in technological route. Proposed solution consist in switching of original algebraic-logical model to model with modified parameters when quality defects appear. In particular algebraic-logical model of flow-shop manufacturing problem with time limits and modified model with additional repair machine are proposed. Furthermore, the switching function from original model into modified model is given.
The presence or absence of worthy ideas is often the reason for companies' success or failure on competitive markets. Companies invest a lot of effort into attracting stakeholder such as customers to submit their ...
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ISBN:
(纸本)9781890843298
The presence or absence of worthy ideas is often the reason for companies' success or failure on competitive markets. Companies invest a lot of effort into attracting stakeholder such as customers to submit their ideas to them. For this purpose companies use several open innovation channels such as idea contests, open innovation platforms and university partnerships to boost the number and quality of external ideas. After a gold-rush period of open innovation activities, external idea contributors are no longer willing to accept companies' terms and conditions. They compare companies according to how trustworthy a company or an open innovation channel is because they want to ensure that the company does not behave in an opportunistic way. Therefore, the question arises of how companies can enhance their trustworthiness, so that idea contributors are willing to submit high-quality ideas. To answer this question we conducted an experimental setting with three groups of students to understand when idea contributors trust companies' terms and conditions and submit their ideas. The results demonstrate that e.g. a mediator is able to enhance an organization's trustworthiness and therefore increase the willingness of a potential contributor to offer an idea to the selected company.
The concept of control of plants represented by (1) has been proposed. Using (2),(3),(4),(5) one can determine plant input U(t) forming its output as Y(T), where "new" time T depending on time-scale A(t) is ...
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ISBN:
(纸本)9781467321242
The concept of control of plants represented by (1) has been proposed. Using (2),(3),(4),(5) one can determine plant input U(t) forming its output as Y(T), where "new" time T depending on time-scale A(t) is defined by dT=A(t) dt, whereas Y(t) is plant "reference" output obtained for A=1. Signal A(t) is obtained as result of static operation A(t)=q(e(t)), where q(0)=0 and e(t) is control system error. The technical applications can base on MFC structure (Fig. 4). The idea of control is simple: if e(t)=A(t)=0, then model (2) is decoupled, values of its state variables and output y are conserved. Because Y follows y (Fig. 4), then changes of plant output are stopped too. If e(t)=A(t) not equal 0, then y and Y tend to reference signal y(o) and rate of follow-up action depends on q(e(t)). During this process the consecutive outputs of model and plant are y(T) and Y(T). Thus, the "reference" response Y(t) defines Y(T). The impressive results illustrating properties of proposed concept are shown in Fig. 5,6. Application of described method simplifies the analysis of system dynamics and yields perfect results of follow-up action (lack of overshoots, short setting times). The idea for SISO case has been generalized to form enabling control of MIMO plants.
In the modern verification environment an FPGA-based prototyping has become an important part of the whole verification flow. The ability to simulate real time application in more realistic speeds allows much higher c...
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ISBN:
(纸本)9781467381239
In the modern verification environment an FPGA-based prototyping has become an important part of the whole verification flow. The ability to simulate real time application in more realistic speeds allows much higher coverage than traditional HDL logic simulators. The main disadvantage of FPGA prototyping is inability to inspect and observe internal FPGA signals. Currently there are two traditional solutions for this problem. The first solution is using embedded trace-buffers to record a subset of internal signals and the second solution captures a snapshot of the current FPGA state. Both of these techniques have certain benefits and shortcomings. In this paper, we present an idea of merging these two techniques into a new hybrid approach. Using this idea we created a hybrid circuit and during our experiments showed that it preserves all good sides from both traditional approaches.
The objective of this study is to analyze a new disruptive deployment of wireless sensors in order to cope with the explosive demand for bandwidth while taking into account energy consumption considerations. The work ...
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ISBN:
(纸本)9781479949120
The objective of this study is to analyze a new disruptive deployment of wireless sensors in order to cope with the explosive demand for bandwidth while taking into account energy consumption considerations. The work is grounded on the idea of massive network densification by drastically increasing the number of sensors in a given area in a Time Division Duplex (TDD) mode. Using ideas from the recent Massive MIMO technology (more than 400 antennas, without any modification of the network infrastructure), we transpose the idea to a massive deployment of sensors and show the benefits of such an infrastructure. This research is expected to provide the optimal deployment of massive wireless sensor networks in terms of cost/performance/complexity/energy efficiency trade-off and define the next generation wireless Machine-to-Machine (M2M) communication.
This paper describes an idea of one approach to small aircraft safety increasing. The project was founded as reaction on numbers of small simple-engine aircraft accidents in the Czech Republic and their usual reason -...
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ISBN:
(纸本)9781467317009
This paper describes an idea of one approach to small aircraft safety increasing. The project was founded as reaction on numbers of small simple-engine aircraft accidents in the Czech Republic and their usual reason - human factor. Pilots and schools in the Czech Republic recently started to use glass cockpits which can be used also in other way than pure EFIS. Glass cockpit system could be extended by appropriate safety software modules. Software modules can be used in critical situations for flight analysis and giving appropriate advices to the pilot. Under this project was developed simple module navigating pilot to landing site when engine fails. Paper describes first version of EFIS with mentioned modules and also summarizes idea of designing system including testing approaches.
Power demand of data centers is a topic of great interest and numerous research papers. Most handle power saving by using virtualization technologies and server consolidation. In this position paper, we propose the id...
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ISBN:
(纸本)9781467353267;9781467353274
Power demand of data centers is a topic of great interest and numerous research papers. Most handle power saving by using virtualization technologies and server consolidation. In this position paper, we propose the idea of approaching a specific power consumption of an entire data center by using virtual machine migration strategies. To achieve this goal, several models of data center components are needed. We illustrate the models we developed as well as the measurement set-up and results we have. These are especially models for server power estimation and for a virtual machine power breakdown. At the end of the paper, we present our further ideas and future research intentions.
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