Practical Attacks on a RFID Authentication Protocol Conforming to EPC C-1 G-2 Standard

Yeh et al. recently have proposed a mutual authentication protocol based on EPC Class-1 Gen.-2 standard [1]. They have claimed that their protocol is secure against adversarial attacks and also provides forward secrecy. In this paper we will show that the proposed protocol does not have proper security features. A powerful and practical attack is presented on this protocol whereby the whole security of the protocol is broken. Furthermore, Yeh et al. protocol does not assure the untraceabilitiy and backward untraceabilitiy aspects. Namely, all past and next transactions of a compromised tag will be traceable by an adversary.Comment: 13 page, International Journal of Ubicom

Cryptanalysis of two mutual authentication protocols for low-cost RFID

Radio Frequency Identification (RFID) is appearing as a favorite technology for automated identification, which can be widely applied to many applications such as e-passport, supply chain management and ticketing. However, researchers have found many security and privacy problems along RFID technology. In recent years, many researchers are interested in RFID authentication protocols and their security flaws. In this paper, we analyze two of the newest RFID authentication protocols which proposed by Fu et al. and Li et al. from several security viewpoints. We present different attacks such as desynchronization attack and privacy analysis over these protocols.Comment: 17 pages, 2 figures, 1 table, International Journal of Distributed and Parallel system

New Model Reference Adaptive System Speed Observer for Field-Oriented Control Induction Motor Drives Using Neural Networks

One of the primary advantages of field-oriented controlled induction motor for high performance application is the capability for easy field weakening and the full utilization of voltage and current rating of the inverter to obtain a wide dynamic speed rangeThis paper describes a Model Reference Adaptive System (MRAS) based scheme using Artificial Neural Network (ANN) for online speed estimation of sensorless vector controlled induction motor drive. The proposed MRAS speed observer uses the current model as an adaptive model. The neural network has been then designed and trained online by employing a back propagation network (BPN) algorithm. The estimator was designed and simulated in Matlab/Simulink. Simulation result shows a good performance of speed estimator. The simulation results show good performance in various operating conditions. Also Performance analysis of speed estimator with the change in resistances of stator is presented. Simulation results show this estimator robust to parameter variations especially resistances of stator

New Model Reference Adaptive System Speed Observer for Field-Oriented Control Induction Motor Drives Using Neural Networks

One of the primary advantages of field-oriented controlled induction motor for high performance application is the capability for easy field weakening and the full utilization of voltage and current rating of the inverter to obtain a wide dynamic speed rangeThis paper describes a Model Reference Adaptive System (MRAS) based scheme using Artificial Neural Network (ANN) for online speed estimation of sensorless vector controlled induction motor drive. The proposed MRAS speed observer uses the current model as an adaptive model. The neural network has been then designed and trained online by employing a back propagation network (BPN) algorithm. The estimator was designed and simulated in Matlab/Simulink. Simulation result shows a good performance of speed estimator. The simulation results show good performance in various operating conditions. Also Performance analysis of speed estimator with the change in resistances of stator is presented. Simulation results show this estimator robust to parameter variations especially resistances of stator

Nasal Drug Delivery Systems: An Overview

Since ancient times, drugs have been administered via the nasal route for therapeutic and recreational purposes. The interest in, and importance, of the systemic effects of drugs administered through the nasal route, have expanded over recent decades. Intra-nasal administration of drugs offers an interesting alternative for achieving systemic therapeutic effects of drugs that are comparable to the parenteral route, which can be inconvenient at times or oral administration, which can result in unacceptably low drug bioavailability. So, it is important to understand the potential and limitations of various nasal drug delivery systems. Therefore, the aim of this review article is to discuss the various pharmaceutical dosage forms that have the potential to be utilised for local or systemic drug administration. It is intuitively expected that this review will help to understand and further to develop suitable intra-nasal formulations to achieve specific therapeutic objectives

Studi Kemampuan Pati Biji Durian Sebagai Bahan Pengikat Dalam Tablet Ketoprofen Secara Granulasi Basah

Many type of starch from various plants can be exploited as an alternative for additional materials in tablet formulation. One of the source that have been developed as a pharmaceutical excipient is durian seed starch, which relatively easy to find in tropic area such as Indonesia. The objective of this research was to observe the ability of durio seed starch as binder in wet granulation of ketoprofen tablet formulation. Durio seed starch obtained by extraction and drying methode. Starch as a paste used in wet granulation as a binder. Tablet made by wet granulation with ketoprofen (25%) as a drug model; calcium phosphate dihidrate as a diluent; Avicel® PH 102 as a disintegrant; magnesium stearat (1%) and talc (2%) as a lubricant. Placebo formula with various durio seed starch concentration (5%, 6%, 8%, 10%) in tablet compared to other binder that is cassava starch. Placebo tablet formula with better hardness and friability used in ketoprofen tablet formula and compared to cassava starch as a binder with the same concentration. Formula with durio seed starch as binder have smaller hardness and more friable than cassava starch as a binder. Thereby tablet with durio seed starch as binder have faster disintegration time than tablet with cassava starch as a binder. The dissolution test for both ketoprofen formula did not meet the pharmacopeial requirements