Efficient Construction of Order-Preserving Encryption Using Pseudo Random Function

Steganography is the special art of hidding important and confidential information in appropriate multimedia carrier. It also restrict the detection of hidden messages. In this paper we proposes steganographic method based on dct and entropy thresholding technique. The steganographic algorithm uses random function in order to select block of the image where the elements of the binary sequence of a secret message will be inserted. Insertion takes place at the lower frequency AC coefficients of the block. Before we insert the secret message. Image under goes dc transformations after insertion of the secret message we apply inverse dc transformations. Secret message will only be inserted into a particular block if entropy value of that particular block is greater then threshold value of the entropy and if block is selected by the random function. In Experimental work we calculated the peak signal to noise ratio(PSNR), Absolute difference , Relative entropy. Proposed algorithm give high value of PSNR and low value of Absolute difference which clearly indicate level of distortion in image due to insertion of secret message is reduced. Also value of relative entropy is close to zero which clearly indicate proposed algorithm is sufficiently secure.

Download Full-text

High-efficient Construction and Long-term Durability of Concrete Structures with Low Dust Emission Type Dry Spray System

Concrete Journal ◽

10.3151/coj.57.5_391 ◽

2019 ◽

Vol 57 (5) ◽

pp. 391-396

Author(s):

M. Mori ◽

M. Soukura ◽

T. Okamura

Keyword(s):

Dust Emission ◽

Concrete Structures ◽

Spray System ◽

High Efficient ◽

Efficient Construction ◽

Durability Of Concrete

Download Full-text

Problem of energy efficiency in the model of sustainable development in Ukraine: EU experience

Socio-Economic Problems of the Modern Period of Ukraine ◽

10.36818/2071-4653-2019-1-4 ◽

2019 ◽

pp. 18-23

Author(s):

Vasyl Zelenko ◽

Yaryna Ferenchak ◽

Nataliya Zelenko

Keyword(s):

Energy Efficiency ◽

Sustainable Development ◽

Energy Saving ◽

Association Agreement ◽

Climate Conditions ◽

The Sustainable Development ◽

Non Profit ◽

Efficiency Measures ◽

Efficient Construction

The paper outlines major preconditions of development of energy efficiency programs and the process of their introduction from the perspective of sustainable development concept. Energy saving measures of European Union are examined, its experience and results, like green books and Thermie programs, etc are analyzed. The paper also specifies relevant activities and responsibilities undertaken by Member States by 2030 and the rates planned to be achieved. The experience of neighboring Poland in energy efficiency promotion is analyzed, as far as the country most closely resembles Ukraine by the initial rates in 1990. We calculated conditional losses of Ukraine in 2017 as the gap between the rates of energy efficiency of Ukraine and Poland (similarity of climate conditions and the state of housing funds allowed us to assume that the comparison will be the most correct regarding Ukraine). The results of calculations make us conclude that the funds are used most efficiently if the money designated, for example, for subsidizing of population are directed at strengthening of energy efficiency (at least up to the level of neighboring country). It will result in saving of about 40 billion. This is the amount defined as Ukrainian capacity in terms of improvement of energy saving and possible results of its realization. The paper determines the stage Ukraine is at in introduction of energy efficiency measures and programs: “warm loans” program; conditions regarding energy saving in Ukraine enshrined in the EU-Ukraine Association Agreement; creation of legal basis, namely the Law of Ukraine “On Energy Efficiency Fund” as of 8 June 2017. The role of newly created Energy Efficiency Fund is analyzed. Special attention is paid to the fact that energy efficient construction is one of international liabilities undertaken by Ukraine. The presence of The Active House Alliance at Ukrainian market is an important achievement in this sphere as it is the non-profit association aiming at creation of housing concept corresponding to the sustainable development principles.

Download Full-text