Journal of Applied Computer Science & Mathematics

Journal of Applied Computer Science & Mathematics

Basic info

  • Publisher: Editura Universitatii Stefan cel Mare
  • Country of publisher: romania
  • Date added to EuroPub: 2019/Nov/13

Subject and more

  • LCC Subject Category:
  • Publisher's keywords:
  • Language of fulltext: english
  • Time from submission to publication: weeks

Publication charges

  • Article Processing Charges (APCs): No
  • Submission charges: No
  • Waiver policy for charges? No

Open access & licensing

  • Type of License:
  • License terms
  • Open Access Statement: No
  • Year open access content began: 2007
  • Does the author retain unrestricted copyright? False
  • Does the author retain publishing rights? False

Best practice polices

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This journal has '34' articles

An Attribute Involved Public Key Cryptosystem Based on P-Sylow Subgroups and Randomization

An Attribute Involved Public Key Cryptosystem Based on P-Sylow Subgroups and Randomization

Authors: Sumalatha GUNNALA, Shirisha KAKARLA, Srirama Murthy DASIKA
Year: 2018, Volume: 12, Number: 25
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Abstract

The Asymmetric Key Cryptosystem (AKC) or Public Key Encryption (PKE) is a mechanism used to encrypt the messages by using public key and decrypt the enciphered messages by using private key. Of late, the Attribute-Based Encryption (ABE) is an expansion of asymmetric key encryption scheme that allows users to encrypt and decrypt the plaintext messages using the key based on the user’s credentials, called attributes, like social security number, PAN (Permanent Account Number), email ids or Aadhar number etc. Most of the existing ABE schemes rely on the multiple attributes from which the access control policies are derived. These policies define the users’ private keys, required for the decryption process and access to the confidential information. In this paper, we proposed a new attribute based asymmetric cryptosystem that uses the features of both the schemes: PKE and ABE. Here, we used a value of an attribute, personal to the user, for the encryption and the decryption process. This scheme assures that the receiver will only be able to access the secret data if recipient is shared with the valid attribute value. The asymmetric nature is this scheme is based on the concept of p-sylow sub-group assumption. In addition, the randomization factor is used in the encipherment process to strengthen the cipher further. The development of this cryptosystem is an embodiment where the merits of randomized asymmetric encryption technique and the attribute based encryption are integrated to achieve the authentication on top of confidentiality to secure the information transmission over the public networks.

Keywords: Attribute based cryptography, p-Sylow subgroups Public key cryptography, Randomization.
Kalman Filters for Estimating the potential GDP

Kalman Filters for Estimating the potential GDP

Authors: Sorin VLAD, Ionut BALAN
Year: 2018, Volume: 12, Number: 25
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Abstract

The estimation of the potential GDP has a twofold importance: on one hand its accurate estimation allows the correct dimensioning of the macroeconomic policies and on the other hand, the study of potential GDP is a research activity allowing a deeper understanding of the economy works. The methods of estimating the potential GDP can be divided into two categories: statistical and structural. Because the potential GDP is unobservable and cannot be derived directly from the statistical data, we used the Kalman Filter (KF) algorithm to estimate it using a model that connects the unobserved with the observed variables. The results were compared to those obtained by applying a Hodrick – Prescott (HP) filter.

Keywords: HP filter, Kalman filter, potential GDP, dynamical system, state space
The Evolution of the Processing Power Needed by the Primary Cryptocurrencies and its profit.

The Evolution of the Processing Power Needed by the Primary Cryptocurrencies and its profit.

Authors: Stefan SFICHI
Year: 2018, Volume: 12, Number: 25
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Abstract

This paper intends to follow the evolution of the processing power needed to mine cryptocurrencies. Because by this year, 2018, they evolved to being over 1500 cryptos, we shell consider reviewing the first 5: Bitcoin, Ethereum, Ripple, Bitcoin Cash and Litecoin (a hierarchy given by coinmarketcap.com. We shall closely overview the first 2: Bitcoin (BTC) and Ethereum (ETH – Ether)

Keywords: processing power, cryptocurrencies, evolution of crypto, money and the cost of crypto
Enhanced White Cane for Visually Impaired People

Enhanced White Cane for Visually Impaired People

Authors: Maymounah ALSHAJAJEER, Maryam T. ALMOUSA, 3Qasem Abu AL-HAIJA
Year: 2018, Volume: 13, Number: 26
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Abstract

ccording to WHO (World Health Organization) statistics, around 285 billion people in the world have visual impairment. They find difficulty in doing their everyday tasks and detecting objects in front of them that can be harmful to them. As a solution to this problem, we introduce a White Cane (Smart Stick) system for assisting visually impaired people. The White Cane comes as a proposed solution to help visually impaired people to detect obstacles and investigate dangers in the world around while walking. The system is designed to act like an artificial vision and alarm unit. It consists of ultrasonic, light, and water sensors, in addition to the microcontroller (Arduino Uno), to receive the sensors signals and process them to short pulses to the Arduino pins where buzzer, vibrator, and blue LED are connected. Moreover, GPS-GSM module is utilized to send SMS location messages to a helper phone when a person gets lost and doesn’t know where to go. We seek in our project to provide a helpful service with affordable price

Keywords: White Cane, Ultrasonic Sensor, Visually Impaired People, Arduino Uno

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