The Need for Image Security

Oct 13, 2025 by wbrum.org 5 views

Introduction

In today's digital life, data security is a crucial aspect that cannot be overlooked. Among various types of digital data, image data is one of the most vulnerable to abuse, such as duplication, modification, and forgery. To protect this data, various security techniques are applied, one of which is cryptography. Cryptographic algorithms are divided into two types, namely classical algorithms and modern algorithms. One example of a classic algorithm is Affine Cipher. However, Affine Cipher has a weakness, which is a small key size, so it can be easily solved using the Brute Force technique.

The Need for Image Security

Image data is a valuable asset in various sectors, ranging from the creative industry to the health sector. The protection of image data is not negotiable, and any compromise can lead to severe consequences. Therefore, it is essential to develop a robust security system that can protect image data from unauthorized access, duplication, modification, and forgery.

Affine Cipher: A Classic Cryptographic Algorithm

Affine Cipher is a classic cryptographic algorithm that has been widely used for image encryption. However, it has a weakness, which is a small key size, so it can be easily solved using the Brute Force technique. This weakness can be overcome by implementing the Affine Cipher algorithm in a Three-Pass Protocol scheme.

Three-Pass Protocol: A Secure Image Encryption Scheme

The Three-Pass Protocol is a secure image encryption scheme that involves three stages: encryption, transmission, and decryption. In the encryption stage, the image data is encrypted using the Affine Cipher algorithm. In the transmission stage, the encrypted image data is transmitted over a secure channel. In the decryption stage, the encrypted image data is decrypted using the Affine Cipher algorithm.

Implementation of Affine Cipher in Three-Pass Protocol

The Affine Cipher algorithm was implemented in the Three-Pass Protocol scheme using the Visual Basic programming language. The system was designed to provide a user-friendly interface for image encryption and decryption.

Experiment and Results

The experiment was carried out on images with a size of 200x200 pixels, 300x300 pixels, and 500x500 pixels. The results of the experiment show that the Affine Cipher algorithm implemented in the Three-Pass Protocol scheme is able to restore the image to its original form without losing data integrity. The time needed for the encryption and image decryption process shows variations that match the image size.

Image Size	Execution Time (Encryption)	Execution Time (Decryption)
200x200 pixels	4.73 seconds	4.73 seconds
300x300 pixels	8.68 seconds	8.68 seconds
500x500 pixels	30.64 seconds	30.64 seconds

Conclusion

From these results, it can be concluded that there is a direct relationship between the size of the image and the execution time of the security process. The greater the image size, the longer the time needed to process it. Although there is additional time, the use of the Affine Cipher algorithm in Three-Pass Protocol has proven to be effective in maintaining the integrity of image data.

Recommendations

This approach can be one of the alternatives that is worth applying in various sectors, ranging from the creative industry to the health sector, where the protection of data is not negotiable. The implementation of this system not only provides solutions to the weaknesses that exist in the classic cryptographic algorithm, but also presents a practical and efficient way to protect image data in an increasingly complex digital era.

Future Work

Future work can focus on improving the efficiency of the Affine Cipher algorithm in Three-Pass Protocol by optimizing the encryption and decryption process. Additionally, the system can be extended to support other types of image data, such as video and audio data.

Conclusion

Q: What is the Affine Cipher algorithm?

A: The Affine Cipher is a classic cryptographic algorithm that uses a combination of linear and affine transformations to encrypt and decrypt data. It is a simple and efficient algorithm that has been widely used for image encryption.

Q: What is the Three-Pass Protocol?

A: The Three-Pass Protocol is a secure image encryption scheme that involves three stages: encryption, transmission, and decryption. In the encryption stage, the image data is encrypted using the Affine Cipher algorithm. In the transmission stage, the encrypted image data is transmitted over a secure channel. In the decryption stage, the encrypted image data is decrypted using the Affine Cipher algorithm.

Q: How does the Affine Cipher algorithm work?

A: The Affine Cipher algorithm works by using a combination of linear and affine transformations to encrypt and decrypt data. The algorithm uses a key to perform the transformations, which makes it difficult for unauthorized parties to access the encrypted data.

Q: What are the advantages of using the Affine Cipher algorithm in Three-Pass Protocol?

A: The advantages of using the Affine Cipher algorithm in Three-Pass Protocol include:

Efficiency: The Affine Cipher algorithm is a simple and efficient algorithm that can be easily implemented in software.
Security: The Affine Cipher algorithm provides a high level of security for image data, making it difficult for unauthorized parties to access the encrypted data.
Flexibility: The Affine Cipher algorithm can be easily modified to support different types of image data, such as video and audio data.

Q: What are the limitations of using the Affine Cipher algorithm in Three-Pass Protocol?

A: The limitations of using the Affine Cipher algorithm in Three-Pass Protocol include:

Key size: The Affine Cipher algorithm has a small key size, which makes it vulnerable to brute-force attacks.
Computational complexity: The Affine Cipher algorithm has a high computational complexity, which can make it difficult to implement in hardware.

Q: Can the Affine Cipher algorithm be used for other types of data?

A: Yes, the Affine Cipher algorithm can be used for other types of data, such as text and audio data. However, the algorithm may need to be modified to support different types of data.

Q: How can the Affine Cipher algorithm be improved?

A: The Affine Cipher algorithm can be improved by:

Increasing the key size: Increasing the key size can make the algorithm more secure against brute-force attacks.
Optimizing the algorithm: Optimizing the algorithm can make it more efficient and easier to implement in hardware.
Using a combination of algorithms: Using a combination of algorithms can provide a higher level of security and flexibility.

Q: What are the future directions for research on the Affine Cipher algorithm?

A: The future directions for research on the Affine Cipher algorithm include:

Developing more secure algorithms: Developing more secure algorithms that can provide a higher level of security and flexibility.
Improving the efficiency of the algorithm: Improving the efficiency of the algorithm can make it easier to implement in hardware.
Applying the algorithm to other fields: Applying the algorithm to other fields, such as medicine and finance, can provide a higher level of security and flexibility.