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School of Computer and Communication Engineering, University Malaysia Perlis, Centre of Excellence for Advanced Sensor and Technology and University Malaysia Perlis

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2 Papers

RSSI-based Device Free Localization for Elderly Care Application

Topics: Internet of Things; Sensors

Authors: Shaufikah Shukri ¹ , Latifah Munirah Kamarudin ¹ , David Lorater Ndzi ² , Ammar Zakaria ³ , Saidatul Norlyna Azemi ⁴ , Kamarulzaman Kamarudin ³ and Syed Muhammad Mamduh Syed Zakaria ⁵

Affiliations: ¹ School of Computer and Communication Engineering, University Malaysia Perlis, Centre of Excellence for Advanced Sensor and Technology and University Malaysia Perlis, Malaysia , ² School of Engineering and Computing and University of the West of Scotland, United Kingdom , ³ Centre of Excellence for Advanced Sensor and Technology, University Malaysia Perlis, School of Microelectronic Engineering and University Malaysia Perlis, Malaysia , ⁴ School of Computer and Communication Engineering and University Malaysia Perlis, Malaysia , ⁵ Centre of Excellence for Advanced Sensor and Technology and University Malaysia Perlis, Malaysia

Digital Object Identifier: 10.5220/0006361901250135

Proceedings of IoTBDS 2017, ISBN: 978-989-758-245-5

Quick Abstract

Device-Free Localization (DFL) is an effective human localizing system that exploits changes in radio signals strength of radio network. DFL is playing a critical role in many applications such as elderly care, intrusion detection, smart home, etc. DFL is ideal for monitoring the elderly activities without causing any physical discomfort with the wearable devices. It is challenging for elderly to remember each day to wear or to activate those devices. The purpose of this study is to select the best DFL methods in term of detection and tracking accuracy, which is suitable for human monitoring application especially for elderly and disable people. This paper proposes an RSSI-based DFL system that can be used to detect and locate elderly people in an area of interest (AoI) using changes in signal strength measurements. An attenuation-based and variance based methods have been introduced in the proposed DFL system. In stationary people scenario, attenuation-based method managed to accurately detect the presence of human, which is very suitable for elderly care application compared to variance-based DFL. The result shows that attenuation-based method managed to detect all trajectories of moving people with 100% detection accuracy while variance-based method only give 71.74% accuracy.

Related Ontology Subjects/Areas/Topics (7)

Data Communication Networking	Sensor Networks	Software and Architectures
Enterprise Information Systems	Software Agents and Internet Computing	Telecommunications
Internet of Things

Shalala Cipher, a New Implementation of Vigenere Cipher for Wireless Sensor Node Security

Topics: Algorithms, software engineering and development; Testing (software engineering; penetration; product development); Encryption (all aspects); Experiments of using security solutions and proof-of-concepts; Architecture (technical or organizational)

Authors: Muhammad Shaiful Azrin Md Alimon ¹ , L.M. Kamarudin ² , Azizi Harun ¹ , Ammar Zakaria ¹ and Shaufikah Shukri ¹

Affiliations: ¹ Center of Excellence in Advanced Sensor Technology and University Malaysia Perlis, Malaysia , ² Center of Excellence in Advanced Sensor Technology, University Malaysia Perlis, School of Computer & Communication Engineering and University Malaysia Perlis, Malaysia

Digital Object Identifier: 10.5220/0006358403630369

Proceedings of IoTBDS 2017, ISBN: 978-989-758-245-5

Quick Abstract

Cryptography is a science that deals on the method of converting plaintext into cipher text, usually with the help of encryption keys and encryption algorithm. Current standard implementation of cryptography is proved to require high resource in memory which is not suitable to be implemented in low memory embedded system, thus a lightweight cryptography are required. Vigenere cipher is one of the encryption algorithms that was easy to implement and comprehand, which can be used to provide confidentiality from the third party. Vigenere cipher is a polyalphabetic Ceaser cipher, which means it shifting the character in plaintext to become character of mod of its key character. Even thou Vigenere cipher are a classical cipher that doing its cipher using character compared to modern cipher that doing its cipher using bits and byte, it still can be implemented in modern computer by representing its character based on ASCII Table. Furthermore, because of this, its character can be extended to contain all alphabet and special character in the ASCII Table, thus allowing it to encrypt every character that can be represented using ASCII Table. Originally the resilience of Vigenere cipher is based on two factors: (1) the length of its key, and (2) the randomness of character in its key. Even though increasing the length and the used random character provide a great resilience, it takes away the fun of using dictionary word to encrypt the plaintext. To overcome that, this paper, proposing a method of implementing a Pseudorandom Path that change the flow of mod use by the Vigenere Cipher to encrypt and decrypt either positive mod or negative mod. Usually Vigenere Cipher use positive mode to encrypt, while negative mod to decrypt, however this paper propose a method to combine both mod during encryption or decryption with the supervision from the Pseudorandom Path. This method of implementation and its result were discussed in this paper and named as Shalala Cryptography. The results were compared between using original resilience and a Shalala Cryptography method. The resource requirement to implement this algorithm using C++ language is also shown, which shows a lightweight cryptography scheme in term of RAM consumption and fast processed time, which are suitable to be used in WSN or IoT environment.