INTRODUCTION
Digital signature is a sort of Cryptography. Cryptography means keeping communications private. It is a practical art of converting messages or data into a different form, such that no one read them without having access to the Ëœkeyâ„¢. The message may be converted using a Ëœcodeâ„¢ (in which case each character or group of characters is substituted by an alternative one), or Ëœcipherâ„¢ (in which case the message as a whole is converted, rather than individual characters). It deals with e ....etc

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Seminar Report
On
SIGNCRYPTION
SUBMITTED BY
ANIL C.B.
IN PARTIAL FULFILLMENT OF THE REQUIREMENT FOR THE AWARD OF
DEGREE OF MASTER OF TECHNOLOGY (M.TECH.)
IN
SOFTWARE ENGINEERING
DEPARTMENT OF COMPUTER SCIENCE
COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
COCHIN - 682022
2005Page 2

Signcryption
Department of Computer Science CUSAT
2
DEPARTMENT OF COMPUTER SCIENCE
COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
COCHIN “ 682022
Certificate
This is to certify that the Seminar report entitled
?
Signcryption
?
,
submitted ....etc

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Private-Key Cryptography
• traditional private/secret/single key cryptography uses one key
• Key is shared by both sender and receiver
• if the key is disclosed communications are compromised
• also known as symmetric, both parties are equal
• hence does not protect sender from receiver forging a message & claiming is sent by sender
Public-Key Cryptography
• probably most significant advance in the 3000 year history of cryptography
• uses two keys – a public key and a private key
....etc

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ROBUST AND SECURE AUTHENTICATION PROTOCOL BASED ON
COLLABORATIVE KEY AGREEMENT FOR PEER TO PEER OF DYNAMIC
GROUP
Presented By:
J. Armstrong Joseph 1
P. Arockia Jansi Rani 2
Lecturer, St. Peterâ„¢s Engineering College, Avadi, Chennai, India,
Lecturer, Manonmaniam Sundaranar University, Tamilnadu, India,


ABSTRACT
There is a need for security services to provide group
oriented communication privacy and data integrity in
many group-oriented distributed applications. To provide
this form of group ....etc

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By carefully measuring the amount of time required to perform private key operations, attackers may be able to find fixed Diffie-Hellman exponents, factor RSA keys, and break other cryptosystems.Against a vulnerable system, the attack is computationally inexpensive and often requires only known ciphertext. Actual systems are potentially at risk, including cryptographic tokens, network-based cryptosystems, and other applications where attackers can make reasonably accurate timing measurements. Techniques for preventing the attack for RSA and Dif ....etc

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Imagine a computer whose memory is exponentially larger than its apparent physical size; a computer that can manipulate an exponential set of inputs simultaneously; a computer that computes in the twilight zone of Hilbert space. You would be thinking of a quantum computer. Relatively few and simple concepts from quantum mechanics are needed to make quantum computers a possibility. The subtlety has been in learning to manipulate these concepts. Is such a computer an inevitability or will it is too difficult to build?

The subject of quantum co ....etc

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Finding Bugs in Web Applications Using
Dynamic Test Generation and Explicit-State
Model Checking


Shay Artzi, Adam Kie _zun, Julian Dolby, Frank Tip, Danny Dig,
Amit Paradkar, Senior Member, IEEE, and Michael D. Ernst


Abstract
Web script crashes and malformed dynamically generated webpages are common errors, and they seriously impact the usability of Web applications. Current tools for webpage validation cannot handle the dynamically generated pages that are ubiq ....etc

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Pretty Good Privacy (PGP) is a computer program that provides cryptographic privacy and authentication. PGP is often used for signing, encrypting and decrypting e-mails to increase the security of e-mail communications. It was originally created by Philip Zimmermann in 1991.

PGP and other similar products follow the OpenPGP standard (RFC 4880) for encrypting and decrypting data
a public key encryption program originally written by Phil Zimmermann in 1991. Over the past few years, PGP has got thousands of adherent supporters all over the glo ....etc

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ABSTRACT
The popularity and usefulness of the Internet seem to grow exponentially every day. As a result of this rapid growth, mobile users expect to access the Internetâ„¢s information resources and to communicate with other Internet users. However, providing efficient and reliable stream transmissions in mobile computing environments presents a significant obatacle to the development of mobile computing systems over the Intenet. this paper presents three approaches-known as Fast Retransmissions, Data Interceptions, and ....etc

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Implementation of RSA Algorithm Using Client-Server
Presented By:
GAUTHAM R

Introduction
In cryptography, RSA (which stands for Rivest, Shamir and Adleman ) is an algorithm for public-key cryptography.
It is the first algorithm known to be suitable for signing as well as encryption.
RSA is widely used in electronic commerce protocols, and is believed to be secure given sufficiently long keys and the use of up-to-date implementations.
Network security threats
Network Security Threats
Cryptography
Security in net ....etc

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INTRODUCTION
RSA Algorithm was discovered by a group of three scientists namely Ron Rivest,Adi Shamir and Len Adleman and was first published in 1978.
The RSA scheme is a block cipher in which the plain text and cipher text are integers between 0 and n-1 for some n.
A Typical size of n is 1024 bits or 309 decimal digits.
This is a public key encryption scheme.
In this scheme two pairs of integers {e, n} and {d, n} are used. First of them i.e. {e.n} is called the RSA public key and the other one i.e. {d, n} is called t ....etc

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RF Controlled Robot with Metal Detector and Wireless image and voice transmission(Model Path Finder)
Abstract:
As our project deals with RF controlled robot. This robot is prototype for the “Path Finder”. This robot is controlled by a RF remote. This can be moved forward and reverse direction using geared motors of 60RPM. Also this robot can take sharp turnings towards left and right directions. In our project uses AT89S52 MCU as its controller. A high sensitive induction type metal detector is designed using co ....etc

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