An improved authentication and security scheme for LTE/LTE-A networks
JOURNAL OF AMBIENT INTELLIGENCE AND HUMANIZED COMPUTING
Authors: Panda, Prabhat Kumar; Chattopadhyay, Sudipta
Abstract
Long term evolution (LTE) and LTE-Advanced networks support highly developed authentication and encryption mechanisms. However, these systems still suffer from various security problems such as replay attack, impersonation attack, known key attack, eavesdropping attack and so on. To mitigate these security weaknesses, an improved authentication and security scheme has been proposed for LTE/LTE-A networks. The proposed scheme employs Elliptic Curve Cryptography (ECC), Elliptic Curve Diffie-Hellman (ECDH) and Salsa20 algorithm to improve end to end security and provide faster data transmission for 4G environment. The proposed scheme uses several powerful encryption techniques and also provides proper mutual authentication between User Equipment (UE) and Message Management Entity (MME). The performance of the proposed system has been compared with LTE-A and existing systems in terms of several security attributes and performance parameters. The comparative results show that the proposed scheme outperforms LTE-A as well as other existing schemes.
Opiate Prescribing Practices After Common Isolated Lower Extremity Injuries
JOURNAL OF ORTHOPAEDIC TRAUMA
Authors: Rodriguez-Buitrago, Andres; Attum, Basem; Enata, Nichelle; Evans, Adam; Okwumabua, Ebubechi; Gajari, Vamshi; Obremskey, William T.; Jahangir, Alex
Abstract
Objective: This retrospective study aimed at identifying opiate prescribing practices, the number of morphine milligram equivalents (MMEs) prescribed by orthopaedic and nonorthopaedic providers in patients with operatively treated isolated lower extremity fractures, and provide opiate prescribing recommendations. Methods: Patients older than 18 years with isolated lower extremity (unicondylar, bicondylar, tibial shaft, pilon, and ankle) fractures between 2005 and 2016 were identified. Prescribing information was obtained from the State Controlled Substance Monitoring Database. Descriptive statistics were calculated for each injury and plotted for MME use. Mann-Whitney and Wilcoxon tests were used for data analysis. To aid in clinical relevance, MMEs were converted to number of pills of oxycodone 10 mg (OC 10 mg). Results: Three hundred forty-one patients met our inclusion criteria. Mean age was 45 years; 56% (192/341) were men. Fortyseven percent (159/341) were prescribed opiates before their injury. Orthopaedic providers prescribed more opiates to patients with pilon fractures compared with unicondylar (P = 0.010), tibial shaft (P, 0.001), and ankle (P, 0.001) fractures. Bicondylar plateau fracture patients also received more opiates when compared with unicondylar (P = 0.001), tibial shaft (P, 0.001), and ankle (P, 0.001) fractures. Nonorthopaedic providers prescribed more opiates to patients with pilon fractures when compared with unicondylar (P = 0.006), bicondylar (P, 0.001), tibial shaft (P, 0.001), and ankle fractures (P = 0.006). Differences between orthopaedic and nonorthopaedic MMEs prescribed are significantly different for each injury type (, 0.05). Conclusions: Patients with pilon or bicondylar tibial plateau fractures are currently being prescribed more opiates when compared with other isolated fractures. We have developed an opiate prescription guideline based on what is being prescribed by orthopaedic providers.