Encrypting a Confidential information using Openssl in Ubuntu

1) Go to the Application > Terminal

2) Get root privileges

ubuntu@ubuntu-laptop:~$ sudo -s

3) Check For Openssl

root@ubuntu-laptop:~# openssl version

4)Go to desktop

root@ubuntu-laptop:~# cd ./Desktop

5)Create a text file that contain confidential information (eg:Creditcard info)

root@ubuntu-laptop:~/Desktop# echo "Credit Card Info:5678" > secret.txt

6)A text file with credit card information is created in the desktop and you can open it and see the

credit card number .

root@ubuntu-laptop:~/Desktop# cat secret.txt

So anyone can see your credit card number in the secret.txt text file. We need to encrypt to hide the

information present in the text file

7)For Encryption option

Openssl -h

root@ubuntu-laptop:~/Desktop# openssl --help

8) From the options i will use [aes-256-cbc] encryption standard to encrypt the information present in

the text file.

root@ubuntu-laptop:~/Desktop# openssl enc -aes-256-cbc -a -in secret.txt -out secret.txt.aes256cbc

enter aes-256-cbc encryption password: [enter a password]

Verifying - enter aes-256-cbc encryption password: [verify entered password]

9) Now check the text file information

root@ubuntu-laptop:~/Desktop# cat secret.txt.aes256cbc

10)Shred the secret.txt as we have secret.txt.aes256cbc file where our credit card info is stored

root@ubuntu-laptop:~/Desktop# shred secret.txt

11)Remove secrets.txt

root@ubuntu-laptop:~/Desktop# rm secret.txt

12)Now no one can see your credit card info present in the text file

and inorder the see the information present in the notepad file we use decryption using the aes-256-

cbc standard .

13)

root@ubuntu-laptop:~/Desktop# openssl enc -d -aes-256-cbc -a -in secret.txt.aes256cbc

enter aes-256-cbc decryption password:[enter the password]

The Information Stored in the text file will be displayed.

(2)Integrity

Check the file integrity

To check the file integrity of secret.txt we need to use the md5sum

1) Go to the file directory

root@ubuntu-laptop:~/Desktop#

2) MD5 Sum

root@ubuntu-laptop:~/Desktop# md5sum secret.txt

A md5 hash is generated

Once if you made a small change in the words , the md5 value will be changed .

3) Enter a small dot after opening the text file and compute the md5sum .And see how a dot can

change the md5sum

(3)MD5 Sum using openssl

(4) Anonymity

Anonymity Browser (Tor) will help you to anonymous and all your activities will be hidden.

This tool will change your IP Address within seconds..

Steps:

1)

Go for

www.google.com

,type tor

2)

Click on download from ww.torproject.org

3)

Extract the contents

4)

Go to the extracted location

5)

Click Start tor Browser

6)

You will get a new Mozilla windows open where u can see Congratulation’s .You are using Tor

.

7)

After that go to

www.whatismyipaddress.com

and check the ip address

8)

Note the IP Address

9)

Then go to the task bar there you can find Vidalia Control Panel (Tor Browser)

10)

Click the option (Use new identity)

11)

Then a message will pop up All subsequent connections will appear to be different than your

old connections

12)

Check the ip address now (

www.whatismyipaddress.com

) ,see the change in ip address

13)

After that if u want to stop the tor browser and check the IP Address again to see your real IP. This is the best way for IP Spoofing Technique