Personal Information Annotation on Wearable Computer Users with Hybrid Peer-to-Peer Communication

2006 ◽  
pp. 217-227 ◽  
Author(s):  
Koji Makita ◽  
Masayuki Kanbara ◽  
Naokazu Yokoya
Keyword(s):  
Personal Information ◽  
Peer To Peer ◽  
Computer Users ◽  
Wearable Computer ◽  
Peer Communication

Security Enhancement of Peer-to-Peer Session Initiation

2012 ◽  
pp. 281-308
Author(s):  
Xianghan Zheng ◽  
Vladimir Oleshchuk
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
Hash Table ◽  
Peer To Peer ◽  
Distributed Hash Table ◽  
Peer Communication ◽  
Security Issues ◽  
Security Enhancement ◽  
Advantages And Disadvantages ◽  
The Cost

Today, Peer-to-Peer SIP based communication systems have attracted much attention from both the academia and industry. The decentralized nature of P2P might provide the distributed peer-to-peer communication system without help of the traditional SIP server. However, the decentralization features come to the cost of the reduced manageability and create new concerns. Until now, the main focus of research was on the availability of the network and systems, while few attempts are put on protecting privacy. In this chapter, we investigate on P2PSIP security issues and introduce two enhancement solutions: central based security and distributed trust security, both of which have their own advantages and disadvantages. After that, we study appropriate combination of these two approaches to get optimized protection. Our design is independent of the DHT (Distributed Hash Table) overlay technology. We take the Chord overlay as the example, and then, analyze the system in several aspects: security & privacy, number-of the hops, message flows, etc.

A Decentralized Directory Service for Peer-to-Peer-Based Telephony

2011 ◽  
pp. 330-344
Author(s):  
Fabian Stäber ◽  
Gerald Kunzmann ◽  
Jörg P. Müller
Keyword(s):  
Real World ◽  
Instant Messaging ◽  
Peer To Peer ◽  
Video Communication ◽  
Peer Communication ◽  
Voice Communication ◽  
Tree Algorithm ◽  
Communication Platform ◽  
Directory Service ◽  
Peer To Peer Systems

Decentralized peer-to-peer systems fit well as the underlying infrastructure for IP-telephony, as they provide the scalability for a large number of participants, and are able to handle the limited storage and bandwidth capabilities on the clients. We studied a commercial peer-to-peer-based decentralized communication platform supporting video communication, voice communication, instant messaging, et cetera. One of the requirements of the communication platform is the implementation of a user directory, allowing users to search for other participants. In this chapter, we present the Extended Prefix Hash Tree algorithm that enables the implementation of a user directory on top of the peer-to-peer communication platform in a fully decentralized way. We evaluate the performance of the algorithm with a real-world phone book. The results can be transferred to other scenarios where support for range queries is needed in combination with the decentralization, self-organization, and resilience of an underlying peer-to-peer infrastructure.

Peer to peer communication about hepatitis C treatment amongst people who inject drugs: A longitudinal qualitative study

2021 ◽  
Vol 87 ◽  
pp. 102983
Author(s):  
Stelliana Goutzamanis ◽  
Joseph S Doyle ◽  
Danielle Horyniak ◽  
Peter Higgs ◽  
Margaret Hellard
Keyword(s):  
Hepatitis C ◽  
Qualitative Study ◽  
People Who Inject Drugs ◽  
Peer To Peer ◽  
Peer Communication ◽  
Hepatitis C Treatment
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