Voice over IP (VoIP) services have become prevalent lately because of their potential advantages such as economic efficiency and useful features. Meanwhile, Session Initiation Protocol (SIP) is being widely used as a session protocol for the VoIP services. Many mobile VoIP applications have recently been launched, and they are becoming attractive targets for attackers to steal private informati...

Bare PC systems, which run applications without using any operating system (OS) or kernel, are immune to attacks targeting a specific OS. They also perform better than conventional systems due to their reduced overhead. We describe the design, implementation and performance of a SIP user agent (UA) for secure VoIP on a bare PC system. In particular, we discuss SIP functions and message handling...

The main aim of this study was to demonstrate that the surface immunogenic protein (Sip) of the aquatic pathogen Streptococcus agalactiae is a potential candidate for vaccine development for Oreochromis niloticus. In this study, a Sip was identified. Alignment analysis indicated that the Sip protein was highly homologous with Sip proteins from other S. agalactiae isolated from humans (99%). SDS...

Mobile ad hoc networks (MANETs) are of primary interest as new networks because of their flexibility. The Session Initiation Protocol (SIP) is the main signaling system in 3G and SIP servlets the main service provisioning framework. SIP is now being considered as a basis for signaling in MANETs. This makes the SIP servlets framework a chief candidate for service provisioning in MANETs. In this ...

The notion of frame in a Banach spaces E via semi-inner product was introduced and studied in [16]. In this paper, we give a characterisation for SIP-II Ed-Bessel sequence to be SIP-II Ed-frame. Also, a necessary and sufficient condition for the finite sum of SIP-II Ed frame for E to be a SIP-II Ed frame for E has been obtained. Further, a sufficient condition for the stability of finite sum of...

In many SIP deployments, SIP entities exist in the SIP signaling path between the originating and final terminating endpoints, which go beyond the definition of a SIP proxy, performing functions not defined in Standards Track RFCs. The only term for such devices provided in RFC 3261 is for a Back-to-Back User Agent (B2BUA), which is defined as the logical concatenation of a SIP User Agent Serve...

Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document specifies the SIP P-Profile-Key P-header. This header field is used in the 3rd-Generation Partnership Project (3GPP) IMS (IP Multimedia Subsystem) to provide SIP registrars and SIP proxy servers with t...

Abstract. Sense of indebtedness toward parents (SIP) refers to feelings debt give back for their migration-related sacrifices in second-generation immigrants. Based on Kang (2010), we developed a German SIP scale measure these feelings. The purpose this study was threefold: (1) provide evidence the theoretical factor structure underlying SIP, (2) test SIP’s measurement invariance four immigrant...