Text Encryption and Decryption

Developed By:

Shashi Kr. Singh (1150986)

Sandeep Prasad (1150980)

Sumit Kumar (1150994)

Rishabh Anand (1150967)

Submitted To:

Rupinder Kaur GurmDepartment of Computer Science

RIMT-Institute of Engineering & Technology

Punjab ( India.)

Table of Content

1. Introduction

2. Text Encryption

3. Text Decryption

4. Feasibility-Study

5. Methodology

6. Purpose of Project

7. System Requirements

The process of converting plaintext into

ciphertext

The process of converting ciphertext into

plaintext

Introduction

Encryption

plaintext

message

ciphertext

message

Encryption

Decryption

Decryption

• Encryption is a process wherebyplaintext is converted into or ciphertext.

EncryptionPlaintext X Ciphertext Y

Key K

Text Encryption

The original unaltered contents of themessage or text is called plaintext.

• Decryption is the reverse process of

encryption or encipherment, which is to

convert ciphertext back to its original form of

plaintext.

DecryptionCiphertext Y Plaintext X

Key K

Text Decryption

The altered text after encryption is called as

enciphered text or ciphertext.

• Decryption process needs to use the same key

that is used in the encryption process to obtain

the original plaintext.

• Although one may obtain a copy of the

encrypted message, one must use the correct

key to successfully decrypt the message.

Text Decryption

Feasibility-Study

Methodology

Purpose of Project

• Provides security

• File encryption

• Communication encryption

• Network traffic encryption

• Password manager

• Single sign-on

System Requirements

• Turbo C & C++ and Dev-C

• Works on Windows 7, XP, Vista and 8

• Works on 64 bit Windows & 32 bit Windows

• Mac OS X 10.3 and above

Software Requirements

Hardware Requirements

• Intel Pentium 4 or above

• Floppy-Drive

• CD-ROM drive

• 10 GB of free hard-disk

• keyboard and mouse

• RAM(minimum 512 MB)

Friends…. Any Question ?