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EncryptDecrypt v1.4

This document contains following information.

1) Introduction

2) How to start the program?

3) How to encrypt a file?

4) How to decrypt an encrypted file?

5) Further Help

6) Other products

7) About author

Introduction

You can use this program for encrypting a file with a unique password. The encrypted file can be decrypted only by the password given by the user. Any attempt to decrypt the file with other password will fail. Both encryption and decryption can be done using the same program.

The program can encrypt ASCII, graphic as well as binary files. Though the basic algorithm used for encryption is not very strong, the encrypted file is pretty safe. However, don't use this program if you have to encrypt some top level secret documents.

The program is in the form of executable jar file. You need to have Java Runtime Environment installed on your machine. If you don't have it, you can install it from java.sun.com.

The source code of the program is available. The source code is fully documented, with all major steps explained. It's worth taking a look at the source code.

How to start the program?

To start the program you simply need to simply unzip the file & double click on the file EncryptDecrypt.jar. If that doesn't help you can use the command line : java -jar EncryptDecrypt.jar. If that too doesn't start the program you must be having some serious problem, You can mail me regarding the problem.

How to Encrypt a file?

Step I : Specify the fully qualified name of the file to be encrypted i.e. enter the entire path.

Step II : Enter the password.

Step III : Choose the "Encrypt" option from the 2 radio buttons

Setp IV : Check the next checkbox if you want the original file to be deleted after encrypting it.

Step V : Press the GO! button.

The encrypted file with extension .enc added to its original name will be created in the same folder as the original file. If some error in input occurs, you will be prompted by the program.

How to recover the original file

Step I : Specify the fully qualified name of the file to be decrypted i.e. enter the entire path, along with the extension .enc

Step II : Enter the password which was used for encryption. If password is wrong, error will occur.

Step III : Choose the "Decrypt" option from the 2 radio buttons

Setp IV : Check the next checkbox if you want the encrypted file to be deleted after decrypting it.

Step V : Press the G0! button.

The decrypted file with extension .enc removed from its name will be created in the same folder as the original file. If some error in input occurs, you will be prompted by the program.

Still Facing Problems??

If you still have any sort of problem, you can seek my help by mailing me at vishalm@iitb.ac.in

Other Products

You can download a lots of java stuff from http://www.geocities.com/thejavaplanet which includes java applications like FileSplit, Calculator, java games like JSnake, Need More Speed?, visual effects like rain, lake, explosion, tunnel and java applets like navigation, search, newsticker & firetext.

You can also download wallpapers, screensavers, windows utilities, windows games, fun programs & books from http://www.geocities.com/vishalmamania

About Author

The author Vishal Mamania is a postgraduate student in Computer Science & Engineering department of Indian Institute of Technology.
You can contact me at vishalm@iitb.ac.in or
http://www.geocities.com/vishalmamania (my homepage in general) or
http://www.geocities.com/thejavaplanet (java & only java)

Keep checking for newer versions at http://www.geocities.com/thejavaplanet/javaapps/encdec/index.html . You can obtain the fully documented source code from http://www.geocities.com/thejavaplanet/javaapps/encdec/source.html. Please feel free to distribute this software to as many people you want. Bug reports and suggestions are very welcome.

Copyright © 2002 Vishal Mamania - All Rights Reserved