One of the key step in formal verification is the construction of a formal model of the system to be verified and these models can be visualized as a finite state machine. And model checking is the technique of systematically verifying a system against a set of intended properties. Any Model Checker thus explores all possible interleaved executions of the state machine. Given a specification of the system in terms of a finite state machine and property to be verified, model
checker automatically explores the state space in order to find an exe ....etc

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The Big Book of BitTorrent

By Saikat Basu
The Things I Do


BitTorrent – It’s Just a Simple Way to Share Files
Even God couldn‟t have done it better. The virtue of sharing with our fellow man has been
preached, but perhaps not practiced as often as He would have liked. Thankfully, the World
Wide Web came along to change all that. The internet zips and zaps across borders bringing
information at our fingertips. From restricted bits of data to a free for all exchange of entire
files, the outbreak ....etc

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BitTorrent

BitTorrent consumes significant amount of internet traffic today
In 2004, BitTorrent accounted for 30% of all internet traffic (Total P2P was 60%), according to CacheLogic
Slightly lower share in 2005 (possibly because of legal action), but still significant
BT always used for legal software (linux iso) distribution too.
Millions want to download the same popular huge files (for free)
....etc

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Model checking is the process of checking whether a given structure is a model of a given logical formula. The concept is general and applies to all kinds of logics and suitable structures. A simple model-checking problem is testing whether a given formula in the propositional logic is satisfied by a given structure. An important class of model checking methods have been developed to algorithmically verify formal systems. This is achieved by verifying if the structure, often derived from a hardware or software design, satisfies a formal specifi ....etc

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This article is presented by:
SURYANARAYANA RAJU .G
COMPUTER SCIENCE & ENGINEERING
From
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY
HYDERABAD

ABSTRACT

Existing studies on Bit Torrent systems are single-torrent based, while more than 85% of all peers participate in multiple torrents according to our trace analysis. In addition, these studies are not sufficiently insightful and accurate even for single-torrent models, due to some unrealistic assumptions. ....etc

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OIL PURITY CHECKING IN AUTOMOBILES

Purity in engine oil ensures proper working of engine. Degradation in purity will gradually decrease performance of vehicle and further degradation may completely damage engine.To avoid this, engine oil is changed in particular interval of kilometer.

Even in this case some times it happens to change engine oil after degrading in its quality. This situation can be avoided if we can change engine oil basins on its quality rather than kilometers travelled and arbitrary check engine oil purity indication sys ....etc

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Formal equivalence checking process is a part of electronic design automation (EDA), commonly used during the development of digital integrated circuits, to formally prove that two representations of a circuit design exhibit exactly the same behavior.In general, there is a wide range of possible definitions of functional equivalence covering comparisons between different levels of abstraction and varying granularity of timing details.
The most common approach is to consider the problem of machine equivalence which defines two synchronous desi ....etc

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The BitTorrent Protocol



What is BitTorrent?


Efficient content distribution system using
file swarming. Usually does not perform
all the functions of a typical p2p system,
like searching.


BitTorrent traffic


CacheLogic estimated (around 2003 or so0 that BitTorrent
Traffic accounts for roughly 35% of all traffic on the Internet


File sharing



To share a file or group of files, a peer first
creates a .torrent fil ....etc

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BitTorrent

1. BitTorrent is created by Bram Cohen in 2001.
2. It is peer to peer (P2P) file sharing communication protocol.It is a peer to peer in nature ,users connected to each other directly to send and receive the portions of the file.
It used to transfer very huge files.
The key philosophy of Bit Torrent is that user should upload at the same time they downloading.
5. BitTorrent provides protocol to all torrent clients.
6. This is most popular and efficient file transferring sys ....etc

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DEPARTMENT OF COMPUTER SCIENCE
SEMINAR REPORT
ON
MODEL CHECKING
FOR
SECURING E-COMMERCE TRANSACTIONS
PRESENTED BY
JAHFAR.C
Batch 2008-2010
Department of Computer Science
CUSAT
1Page 2

Seminar Report
Model checking for securing E-commerce transaction
Cochin University of Science & Technology
Cochin-22
DEPARTMENT OF COMPUTER SCIENCE
CERTIFICATE
This is to certify that, the seminar report entitled
ËœMODEL
CHECKING
FOR
SECURING
E-COMMERCE
TRANSACTIONSâ„¢ Submitted by JAHFAR .C in partial fulfillment of the
require ....etc

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