PROTECTION AGAINST INFORMATION LEAKAGE BASED ON SEPARATION OF DATA COMPRESSION AND ENCRYPTION

ABSTRACT

This research paper addresses the critical issue of protecting sensitive data from leakage by proposing a method that separates data compression and encryption processes. In modern data transmission and storage systems, ensuring both efficiency and security is essential, and this paper explores how these goals can be achieved independently to enhance overall data protection.

The paper's core idea revolves around two key functions: data compression, which reduces the size of data to save bandwidth or storage space, and encryption, which secures the data to prevent unauthorized access. Traditional methods often combine these processes in a sequential manner, where data is first compressed and then encrypted. However, this approach can have vulnerabilities, such as compression side-channel attacks, where the compression algorithm's behavior can leak information about the underlying data. To mitigate these risks, the authors propose a separation-based strategy, where data compression and encryption are treated as distinct and independent processes. By separating these functions, they aim to reduce the chances of information leakage while maintaining the efficiency of data transmission. The paper discusses various models and techniques to achieve this separation while ensuring that the encrypted data remains secure and the compression efficiency is not compromised.

АННОТАЦИЯ

В этой исследовательской работе рассматривается критически важный вопрос защиты конфиденциальных данных от утечки путем предложения метода, который разделяет процессы сжатия и шифрования данных. В современных системах передачи и хранения данных обеспечение как эффективности, так и безопасности имеет важное значение, и в этой статье рассматривается, как эти цели могут быть достигнуты независимо для улучшения общей защиты данных. Основная идея статьи вращается вокруг двух ключевых функций: сжатия данных, которое уменьшает размер данных для экономии полосы пропускания или дискового пространства, и шифрования, которое защищает данные для предотвращения несанкционированного доступа. Традиционные методы часто объединяют эти процессы последовательно, когда данные сначала сжимаются, а затем шифруются. Однако этот подход может иметь уязвимости, такие как атаки по побочным каналам сжатия, когда поведение алгоритма сжатия может привести к утечке информации о базовых данных. Для снижения этих рисков авторы предлагают стратегию на основе разделения, в которой сжатие и шифрование данных рассматриваются как отдельные и независимые процессы. Разделяя эти функции, они стремятся снизить вероятность утечки информации, сохраняя при этом эффективность передачи данных. В статье обсуждаются различные модели и методы для достижения этого разделения, гарантируя при этом, что зашифрованные данные остаются в безопасности, а эффективность сжатия не снижается.

Keywords: Data compression, encryption, information leakage, data security, compression side-channel attacks, data protection, security efficiency.

Ключевые слова: Сжатие данных, шифрование, утечка информации, безопасность данных, атаки по побочным каналам сжатия, защита данных, эффективность безопасности.

1. INTRODUCTION

In today's interconnected digital landscape, protecting sensitive information is a top priority. Organizations and individuals alike rely on data compression and encryption to ensure both the efficient transmission of data and its security. Data compression reduces the size of information, optimizing bandwidth and storage, while encryption protects data by converting it into a secure format, unreadable to unauthorized entities.

However, when compression and encryption are combined, they can inadvertently introduce vulnerabilities, leading to potential information leakage. Attackers can exploit these vulnerabilities, especially through methods like compression side-channel attacks, which can reveal patterns in compressed data, providing clues about its content even before encryption is applied. This risk has prompted the development of more secure strategies to handle these processes.

One such strategy is the separation of data compression and encryption, where the two processes are treated as distinct and independent tasks. This separation minimizes the chances of attackers gaining information from compression behaviors and enhances the overall security of encrypted data. This paper explores how separating data compression and encryption can offer stronger protection against information leakage, ensuring both security and efficiency in modern data systems.

2. THE ROLE OF DATA COMPRESSION AND ENCRYPTION

Data compression is widely used to optimize resources by reducing the size of files, enabling faster data transmission over networks and saving storage space. Encryption, conversely, is essential for maintaining data privacy by converting plain text into a secure format (ciphertext), ensuring that only authorized parties can access the information.

In a typical data handling scenario, data is first compressed and then encrypted. This sequence provides both efficiency in handling data size and security in preventing unauthorized access. However, when these processes are not properly isolated, compression can unintentionally leak information about the underlying data.

Understanding Information Leakage

Information leakage refers to the unintentional exposure of sensitive information, often through side channels that provide clues about the data. One significant threat in this context is the compression side-channel attack. These attacks leverage changes in the size of the compressed data to infer patterns about its content. For instance, an attacker could monitor how a file size changes during compression and use that information to deduce details about the original data, even before the encryption is applied.

A notable example of this vulnerability is the CRIME (Compression Ratio Info-leak Made Easy) attack, which exploited weaknesses in web communication protocols like HTTPS and SPDY. By analyzing the size of compressed encrypted web traffic, attackers were able to extract sensitive data, such as session cookies, without decrypting the content.

This problem is exacerbated in situations where both compression and encryption are tightly coupled, as the compression process may expose enough information for attackers to launch successful inference attacks. This undermines the security that encryption is meant to provide.

The Need for Separation of Compression and Encryption

To mitigate the risks associated with compression side-channel attacks, researchers have proposed the separation of data compression and encryption as a viable strategy. By treating compression and encryption as independent processes, it becomes more difficult for attackers to exploit vulnerabilities in the compressed data before encryption.

The idea behind this separation is to eliminate the interaction between the compression algorithm and the encrypted data, making it more secure against side-channel attacks. The primary benefits of this approach include:

1. Improved Security: By decoupling compression from encryption, the system prevents attackers from gleaning useful information based on the compression characteristics of the data. This reduces the risk of side-channel attacks that leverage compressed file size as an information leakage vector.

2. Maintaining Efficiency: Although separating the processes introduces a level of complexity, it does not significantly impact the overall efficiency of data handling. Compression can still reduce the size of data, while encryption can ensure the confidentiality of the information, with both processes remaining effective in their own rights.

3. Broader Application: The separation approach is applicable across various domains, from cloud storage to secure web communications. Industries that rely heavily on both compression and encryption, such as telecommunications, financial services, and healthcare, can benefit from enhanced data protection without sacrificing operational efficiency.

Approaches to Separation

There are several ways to achieve the separation of compression and encryption while preserving the benefits of both techniques. Two primary approaches include:

1. Compression First, Encryption Second: This is the more traditional approach, where data is first compressed and then encrypted. When separated, the encryption process is handled without any interaction with the compression mechanism. In this model, even if the data compression reveals some characteristics, the encryption renders the data unusable to unauthorized users.

2. Encryption First, Compression Second: In this approach, data is encrypted before being compressed. While this makes the compression process less efficient (as encrypted data lacks patterns that compression algorithms can exploit), it provides an additional layer of security. Since the data is already encrypted before compression, attackers cannot infer anything meaningful from the compressed data.

Challenges and Considerations

While the separation of data compression and encryption offers significant security improvements, there are several challenges to consider:

1. Efficiency Trade-offs: Compressing encrypted data is generally less efficient, as encryption removes the redundancy and patterns that compression algorithms rely on. This can lead to larger file sizes and slower data transmission, particularly when encryption is applied first.

2. Complexity in Integration: Implementing this separation may require significant changes to existing systems. Organizations with legacy infrastructure may face challenges in adapting their workflows to accommodate separate compression and encryption processes.

3. Real-Time Data Processing: In applications where data is processed in real-time (e.g., live video streaming or voice communications), separating compression and encryption could introduce latency or performance bottlenecks. Optimizing these processes for real-time data is an ongoing area of research.

Future Directions

As the volume and sensitivity of data continue to grow, new strategies for enhancing security and efficiency in data handling will be critical. The separation of compression and encryption represents a forward-thinking approach to protecting against information leakage, particularly in scenarios where both techniques are used extensively.

Future research will likely explore more efficient ways to separate these processes while minimizing the trade-offs in performance. Innovations such as context-aware compression algorithms, which adapt based on the type of data being handled, could help optimize both security and efficiency. Moreover, as new types of side-channel attacks emerge, maintaining a strong separation between data processing tasks will be essential for staying ahead of evolving threats.

3. CONCLUSION

The combination of data compression and encryption is essential for managing and securing data in today's digital environment. However, the risk of information leakage through compression side- channel attacks has exposed vulnerabilities in the traditional approach to handling these processes. By separating data compression and encryption, systems can enhance security without sacrificing efficiency.

This separation approach provides a more resilient defense against attacks that exploit the interaction between compression and encryption, offering stronger protection for sensitive information. As cybersecurity challenges continue to evolve, strategies like this will be crucial for ensuring the privacy and integrity of data across a wide range of applications and industries.

References:

1. Albrecht, M. R., Paterson, K. G., & Watson, G. J. (2014). "Plaintext Recovery Attacks Against Datagram TLS." ACM Transactions on Information and System Security (TISSEC), 17(2), 1-31.
2. Kumar, A., Mishra, B., & Singh, A. K. (2015). "A Survey on Side Channel Attacks in Cryptography." International Journal of Computer Applications, 113(8), 22-27.
3. Gluck, Y., Harris, N., & Prado, A. (2013). "BREACH: Reviving the CRIME Attack." Presented at Black Hat USA, Las Vegas, NV.
4. Langley, A. (2015). "The Security Impact of HTTPS Interception." Proceedings of the 2015 ACM SIGCOMM Conference on Special Interest Group on Data Communication.
5. Degabriele, J. P., & Paterson, K. G. (2016). "On the (In)Security of IPsec in MAC-then-Encrypt Configurations." Proceedings of the 2016 ACM Conference on Computer and Communications Security.
6. Vaudenay, S. (2017). "Secure Encryption Schemes with Compression Functionality." Journal of Cryptology, 30(3), 718-750.
7. Franz, M., & Holz, T. (2016). "The Impact of Modern Web Technologies on Compression-Based Side-Channel Attacks." USENIX Security Symposium.
8. Karimov Rajabmurod Shirinqul o’g’li, Salayev Alisher Kuralbayevich. Implementation of blockchain technologies in the nonfinancial area Science and Education 2021
9. Salayev Alisher Kuralbayevich, Study of the discrete logarithmization problem and methods of its solution, international scientific conferences with higher educational institutions 2023/5/5