Seminar on Unlicenced Mobile Access

Generic Access Network or GAN is a telecommunication system that extends mobile voice, data and IP Multimedia Subsystem/Session Initiation Protocol (IMS/SIP) applications over IP networks. Unlicensed Mobile Access or UMA, is the commercial name used by mobile carriers for external IP access into their core networks.

The most common application of GAN is in a dual-mode handset service where subscribers can seamlessly handover connections between wireless LANs and wide area networks using a GSM/Wi-Fi dual-mode mobile phone. UMA technology has enabled the convergence of mobile, fixed and Internet telephony, sometimes called Fixed Mobile Convergence.

                       

The local network may be based on private unlicensed spectrum technologies like 802.11, while the wide network is alternatively GSM/GPRS or UMTS mobile services. On the cellular network, the mobile handset communicates over the air with a base station, through a base station controller, to servers in the core network of the carrier.

Under the GAN system, when the handset detects a wireless LAN, it establishes a secure IP connection through a gateway to a server called a GAN Controller (GANC) on the carrier's network. The GANC presents to the mobile core network as a standard cellular base station. The handset communicates with the GANC over the secure connection using existing GSM/UMTS protocols. Thus, when a mobile moves from a GSM to an 802.11 network, it appears to the core network as if it is simply on a different base station.

Power point presentation on UMA

• A study of Unlicensed Mobile Access(UMA) Technology

• Unlicensed Mobile Access (UMA )

• Unlicensed Mobile Access

• Unlicensed Mobile Access (UMA) 2

• UMA Explained - Unlicensed Mobile Access

Seminar on SMTP

Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks. SMTP was first defined by RFC 821 (1982, eventually declared STD 10), and last updated by RFC 5321 (2008)[2] which includes the extended SMTP (ESMTP) additions, and is the protocol in widespread use today. SMTP is specified for outgoing mail transport and uses TCP port 25. The protocol for new submissions is effectively the same as SMTP, but it uses port 587 instead. SMTP connections secured by SSL are known by the shorthand SMTPS, though SMTPS is not a protocol in its own right.

 

While electronic mail servers and other mail transfer agents use SMTP to send and receive mail messages, user-level client mail applications typically only use SMTP for sending messages to a mail server for relaying. For receiving messages, client applications usually use either the Post Office Protocol (POP) or the Internet Message Access Protocol (IMAP) or a proprietary system (such as Microsoft Exchange or Lotus Notes/Domino) to access their mail box accounts on a mail server.

 

Power point presentation on SMTP

• SMTP 1

• Simple Mail Transfer Protocol (SMTP)

• SMTP 2

• Simple Mail Transfer Protocol (SMTP)

• SMTP Presentation

• Simple Mail Transfer Protocol 2

• SMTP PROTOCOL CONFIGURATION AND MANAGEMENT

Seminar on Software as a service

Software as a service (SaaS, typically pronounced [sæs]), sometimes referred to as "on-demand software," is a software delivery model in which software and its associated data are hosted centrally (typically in the (Internet) cloud) and are typically accessed by users using a thin client, normally using a web browser over the Internet.

While practically every Internet service (such as Web search engine or web-based email) is driven by some underlying software, the term software as a service is often used in the context of business applications, and in some cases even more narrowly as software in a category which has on-premises software; i.e., equivalent applications that are installed in businesses' computer networks or personal computers.

 

SaaS has become a common delivery model for most business applications, including accounting, collaboration, customer relationship management (CRM), enterprise resource planning (ERP), invoicing, human resource management (HRM), content management (CM) and service desk management. SaaS has been incorporated into the strategy of all leading enterprise software companies.

According to a Gartner Group estimate, SaaS sales in 2010 have reached $9B, up 15.7% from 2009, and are projected to increase to $10.7b in 2011, up 16.2% from 2010. Gartner Group also estimates that SaaS applications, which accounted for a little more than 10% of the total enterprise software market last year, would represent at least 16% of worldwide software sales by 2014.

The term software as a service (SaaS) is considered to be part of the nomenclature of cloud computing, along with infrastructure as a service (IaaS) and platform as a service (PaaS).

Power point presentation on Software as a service

• Software as a service (Saas)

• Software as a Service

• SaaS - An Overview

• SAAS vs traditional software

• SaaS Contracts

• Software as a Service

Project Abstract - Combinatorial Approach For Preventing Sql Injection Attacks

A combinatorial approach for protecting Web applications against SQL injection is discussed in this paper, which is a novel idea of incorporating the uniqueness of Signature based method and auditing method. The major issue of web application security is the SQL Injection, which can give the attackers unrestricted access to the database that underlie Web applications and has become increasingly frequent and serious. From signature based method standpoint of view, it presents a detection mode for SQL injection using pair wise sequence alignment of amino acid code formulated from web application form parameter sent via web server.

 

                  

 

On the other hand from the Auditing based method standpoint of view, it analyzes the transaction to find out the malicious access. In signature based method It uses an approach called Hirschberg algorithm, it is a divide and conquer approach to reduce the time and space complexity. This system was able to stop all of the successful attacks and did not generate any false positives.

• Advanced Topics on SQL Injection Protection.ppt – OWASP

• SQL Injection Attacks

• Database Security: Access Control and SQL Injection

• Introduction to Computer and Communications Security

• SQL Injection Attacks

• Preventing SQL Injection Attacks

• Preventing SQL Injection

Project Abstract - Resequencing Analysis Of Stop-And-Wait Arq For Parallel Multichannel Communications

In this paper, we consider a multichannel data communication system in which the stop-and-wait automatic-repeat request protocol for parallel channels with an in-sequence delivery guarantee (MSW-ARQ-inS) is used for error control. We evaluate the resequencing delay and the resequencing buffer occupancy, respectively. Under the assumption that all channels have the same transmission rate but possibly different time-invariant error rates, we derive the probability generating function of the resequencing buffer occupancy and the probability mass function of the resequencing delay. Then, by assuming the Gilbert–Elliott model for each channel, we extend our analysis to time-varying channels. Through examples, we compute the probability mass functions of the resequencing  buffer occupancy and the resequencing delay for time-invariant channels. From numerical and simulation results, we analyze trends in the mean resequencing buffer occupancy and the mean resequencing delay as functions of system parameters. We expect that the modeling technique and analytical approach used in this paper can be applied to the performance evaluation of other ARQ protocols (e.g., the selective-repeat ARQ) over multiple time-varying channels. Index Terms—In-sequence delivery, modeling and performance, multichannel data communications, resequencing buffer occupancy, resequencing delay, SW-ARQ.