scholarly journals Spinal Shock: Differentiation from Neurogenic Shock and Key Management Approaches

2020 ◽  
Author(s):  
Keith Conti ◽  
Vikas Yellapu ◽  
Joan Sweeney ◽  
Steven M. Falowski ◽  
Stanislaw P. Stawicki
Keyword(s):  
Key Management ◽  
Spinal Shock ◽  
Neurogenic Shock ◽  
Management Approaches

scholarly journals Redundancy in Key Management for WSNs

Cryptography ◽  
2018 ◽  
Vol 2 (4) ◽  
pp. 40
Author(s):  
Filippo Gandino ◽  
Bartolomeo Montrucchio ◽  
Maurizio Rebaudengo
Keyword(s):  
Wireless Sensor Networks ◽  
Key Management ◽  
Careful Analysis ◽  
Combinatorial Design ◽  
Wireless Sensor ◽  
Management Systems ◽  
Symmetric Encryption ◽  
Storage Overhead ◽  
Secret Keys ◽  
Management Approaches

Security in wireless sensor networks is commonly based on symmetric encryption and requires key-management systems to establish and exchange secret keys. A constraint that is common to many key-management approaches is an upper bound to the total number of nodes in the network. An example is represented by the schemes based on combinatorial design. These schemes use specific rules for the generation of sets of keys that are distributed to the nodes before deploying the network. The aim of these approaches is to improve the resilience of the network. However, the quantity of data that must be stored by each node is proportional to the number of nodes of the network, so the available memory affects the applicability of these schemes. This paper investigates the opportunity of reducing the storage overhead by distributing the same set of keys to more than one node. In addition, the presence of redundant sets of keys affects the resilience and the security of the network. A careful analysis is conducted to evaluate benefits and drawbacks of redundant key distribution approaches. The results show that the use of redundancy decreases the level of resilience, but it scales well on very large networks.

scholarly journals A modified CLIQUES key agreement protocol for secure multicast

2021 ◽  
Author(s):  
Xiaoyan Chen
Keyword(s):  
Key Management ◽  
Key Agreement ◽  
Individual Member ◽  
Session Key ◽  
Membership Change ◽  
Diffie Hellman ◽  
The Common ◽  
Management Approaches ◽  
Static Group ◽  
Key Tree

In a secured multicast application, members may join or leave frequently. Hence, key management is one of the most challenging problems. A practical and scalable key management requires high security features, efficient key distribution, low key-storage cost, and small processing overhead. CLIQUES (1-5) scheme was proposed to handle contributory key agreement. It extends the two-party Diffie-Hellman (6) algorithm to allow a group of members to "agree" upon a symmetric group key. Among the existing key management approaches, CLIQUES has the lowest cost in establishing the common session key. It also imposes less processing overhead in the user machine. The main drawback of CLIQUES is that a large number of re-key messages have to be exchanged among members when there is a membership change. The number of messages exchanged is proportional to the size of the membership. Consequently, CLIQUES is not very scalable and cannot support large group of members. In this thesis, we proposed a Static CLIQUES, in which, a static group controller is introduced to reduce the complexity of status synchronization process within the group when there is a membership change. The number of keys stored in each member is smaller than that of the original CLIQUES. In addition, the use of static group controller provides member privacy protection since individual member does not have direct contact with other members. We also proposed a hierarchical CLIQUES structure to support a large number of members by sub-grouping them logically into a hierarchical key tree. It is more scalable than dynamic CLIQUES. The size of re-key message being distributed is found to be comparable with hierarchical key tree approach (7-11).

scholarly journals A modified CLIQUES key agreement protocol for secure multicast

2021 ◽  
Author(s):  
Xiaoyan Chen
Keyword(s):  
Key Management ◽  
Key Agreement ◽  
Individual Member ◽  
Session Key ◽  
Membership Change ◽  
Diffie Hellman ◽  
The Common ◽  
Management Approaches ◽  
Static Group ◽  
Key Tree

In a secured multicast application, members may join or leave frequently. Hence, key management is one of the most challenging problems. A practical and scalable key management requires high security features, efficient key distribution, low key-storage cost, and small processing overhead. CLIQUES (1-5) scheme was proposed to handle contributory key agreement. It extends the two-party Diffie-Hellman (6) algorithm to allow a group of members to "agree" upon a symmetric group key. Among the existing key management approaches, CLIQUES has the lowest cost in establishing the common session key. It also imposes less processing overhead in the user machine. The main drawback of CLIQUES is that a large number of re-key messages have to be exchanged among members when there is a membership change. The number of messages exchanged is proportional to the size of the membership. Consequently, CLIQUES is not very scalable and cannot support large group of members. In this thesis, we proposed a Static CLIQUES, in which, a static group controller is introduced to reduce the complexity of status synchronization process within the group when there is a membership change. The number of keys stored in each member is smaller than that of the original CLIQUES. In addition, the use of static group controller provides member privacy protection since individual member does not have direct contact with other members. We also proposed a hierarchical CLIQUES structure to support a large number of members by sub-grouping them logically into a hierarchical key tree. It is more scalable than dynamic CLIQUES. The size of re-key message being distributed is found to be comparable with hierarchical key tree approach (7-11).

scholarly journals Multi-tier Framework for Optimizing Pairwise Key Predistribution in Sensory Applications

2019 ◽  
Vol 9 (2) ◽  
pp. 3774-3780
Keyword(s):  
Digital Signature ◽  
Key Management ◽  
Resource Constraints ◽  
Cost Effective ◽  
Wireless Sensor ◽  
Public Key Encryption ◽  
Key Predistribution ◽  
Management Scheme ◽  
Analytical Research ◽  
Management Approaches

Security has been always a prominent concern in Wireless Sensor Network (WSN) irrespective of the evolution of various scientific approaches that mainly mechanizes key management approaches to secure the communication system among the resource constraints sensors. Out of various key management approaches, pairwise key is one effective approach to ensure cost effective key management scheme; however, review of existing approaches shows that they still are characterized by various issues connected to optimized performance. Adopting analytical research methodology, the proposed system implements an optimized multi-tier framework for resisting key-based threats and it targets to introduce a lightweight pair wise predistribution of keys by joint integration of enhanced public key encryption and digital signature. The study outcome shows that proposed system offer a better security performance in contrast to existing pair wise predistribution of keys.

Drug-Induced Movement Disorders

2015 ◽  
Vol 25 (2) ◽  
pp. 70-77
Author(s):  
Amy Lustig ◽  
Cesar Ruiz
Keyword(s):  
Movement Disorders ◽  
Medical Management ◽  
Disease Process ◽  
Underlying Disease ◽  
Extrapyramidal Symptoms ◽  
Drug Induced ◽  
General Overview ◽  
Management Approaches ◽  
Broad Understanding ◽  
Underlying Disease Process

The purpose of this article is to present a general overview of the features of drug-induced movement disorders (DIMDs) comprised by Parkinsonism and extrapyramidal symptoms. Speech-language pathologists (SLPs) who work with patients presenting with these issues must have a broad understanding of the underlying disease process. This article will provide a brief introduction to the neuropathophysiology of DIMDs, a discussion of the associated symptomatology, the pharmacology implicated in causing DIMDs, and the medical management approaches currently in use.

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