The purpose of avoiding unauthorized access using the Watermarking technique is an important role in Cyber Security.
What is watermarking technique in phishing? A visible watermark is a common way of recognizing images and protecting them from unauthorized use online.
The watermarking images are intended to be distinctive for every user. It carries a shared secret between the company and the user in order to stop attacks like phishing.
How avoiding unauthorized access using the Watermarking Technique?
Digital watermarking provides authentication, validation and copyright protection.
Here, the client will enter the URL to view the required webpage of a particular web server.
The credibility of the website is important. To increase it, the client machine’s current date and time will be displayed at the client browser.
Usually, when the phishing attack occurs, the page may redirect during the money transaction.
When the clients need to enter their personal details, such as the online banking password or ATM pin number, they need to login.
After logging in, the client may not know whether he is in a correct page or not.
How the user can find she/he is in the legitimate page?
Here is where the watermarking technique plays a major role.
After logging in, and before giving the personal details, the user can check the credibility level of the webpage.
Before logging into a commercial website, the user can see his/her machine’s date and time in the logo, which is initiated from the server.
After logging in, if the user places the cursor over the logo, the secret code will be displayed.
This secret code is user-dependent and it will be stored in the server database. If the user places the cursor at the top of the web page, the user’s name will be displayed. This you can see in the following picture,
But the attacker may hack the server database to get the respective secret code of the user. He may show the watermark on the fake website as a legitimate website.
Encryption of the secret code
To avoid the hacker hacking the secret code, the server will encrypt the secret code, using the symmetric key encryption algorithm before storing it in the database.
This encrypted watermarking mechanism is more secure than the previous ones. Here, the date and time are initiated from the server and the secret code is displayed only after decryption.
Even if the attacker hacks the server database he/she cannot understand the secret code.
Here, the main advantages are,
(i). The secret code will be decrypted on the client-side
(ii). The server will send the encrypted secret code only to the client side.
Watermarking is the secure technique, the watermarking photos are also used for this prevention method.
Security Analysis of Image Watermarking Technique
The man in the middle attacks can be prevented by this technique.
An attacker may watch a session open on a network. Once authentication is over, he might attack the client system to disable it, and use IP spoofing to declare to be the client who was just authenticated and take the session.
Here, there is a possibility for the attacker to discover both the customer’s web account name and the security code for the current session.
We have discussed how to avoid unauthorized access using the Watermarking Technique. This is the simplest and easiest technique to avoid phishing. But it is one of the most efficient watermarking techniques to prevent unauthorized access.
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