Encryption and decryption of data using cryptography
1. Text
Encryption and Decryption
Developed By:
Shashi Kr. Singh (1150986)
Sandeep Prasad (1150980)
Sumit Kumar (1150994)
Rishabh Anand (1150967)
Submitted To:
Rupinder Kaur Gurm
Department of Computer Science
RIMT-Institute of Engineering & Technology
Punjab ( India.)
2. Table of Content
1. Introduction
2. Text Encryption
3. Text Decryption
4. Feasibility-Study
5. Methodology
6. Purpose of Project
7. System Requirements
3. The process of converting plaintext into
ciphertext
The process of converting ciphertext into
plaintext
Introduction
Encryption
plaintext
message
ciphertext
message
Encryption
Decryption
Decryption
4. • Encryption is a process whereby
plaintext is converted into or ciphertext.
Encryption
Plaintext X Ciphertext Y
Key K
Text Encryption
The original unaltered contents of the
message or text is called plaintext.
5. • Decryption is the reverse process of
encryption or encipherment, which is to
convert ciphertext back to its original form of
plaintext.
Decryption
Ciphertext Y Plaintext X
Key K
Text Decryption
The altered text after encryption is called as
enciphered text or ciphertext.
6. • 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
9. Purpose of Project
• Provides security
• File encryption
• Communication encryption
• Network traffic encryption
• Password manager
• Single sign-on
10. 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)
