[Paper Review] A Review On Securing Distributed Systems Using Symmetric Key Cryptography

R. Satheesh Babu, George Abraham+1 more|arXiv (Cornell University)|Mar 2, 2013

Chaos-based Image/Signal Encryption8 references3 citations

TL;DR

This paper reviews symmetric key cryptography's role in securing distributed systems, focusing on DES and AES algorithms. It evaluates their security parameters—key size, block size, and number of rounds—demonstrating that AES offers superior security and efficiency over DES due to larger key and block sizes and more robust design.

ABSTRACT

This review is aimed to evaluate the importance of Symmetric Key Cryptography for Security in Distributed Systems. Businesses around the world as well as research and other such areas rely heavily on distributed systems these days. Hence, security is also a major concern due to the openness of the system. Out of the various available security measures, we, in this paper, concentrate in general on the symmetric key cryptographic technique. We review two widely used and popular symmetric key cryptographic algorithms, viz. DES and AES. These two algorithms are evaluated on the parameters such as key size, block size, number of iterations, etc.

Motivation & Objective

• To assess the relevance and effectiveness of symmetric key cryptography in securing modern distributed systems.
• To evaluate the security and performance characteristics of widely used symmetric algorithms, specifically DES and AES.
• To compare DES and AES based on critical cryptographic parameters such as key size, block size, and number of encryption rounds.
• To provide a comprehensive analysis to guide system designers in selecting appropriate symmetric encryption techniques for distributed environments.

Proposed method

• Systematic review of existing literature on symmetric key cryptography in distributed systems.
• Selection and analysis of two major symmetric algorithms: Data Encryption Standard (DES) and Advanced Encryption Standard (AES).
• Evaluation of DES and AES based on key size (56-bit vs. 128/192/256-bit), block size (64-bit vs. 128-bit), and number of encryption rounds (16 vs. 10/12/14).
• Comparison of algorithmic structure, security strength, and computational efficiency using published benchmarks and design principles.
• Use of tabular and graphical representations (7 figures, 1 table) to illustrate performance and security trade-offs.
• Focus on practical implications for real-world distributed system deployment, emphasizing security and performance trade-offs.

Experimental results

Research questions

• RQ1 How do DES and AES compare in terms of key size, block size, and number of encryption rounds?
• RQ2 What are the security limitations of DES that make it unsuitable for modern distributed systems?
• RQ3 Why is AES considered more secure and efficient than DES in contemporary distributed environments?
• RQ4 What are the practical implications of using symmetric key cryptography in securing distributed system communications?
• RQ5 How do the design parameters of DES and AES influence their suitability for distributed system security?

Key findings

• DES uses a 56-bit key size, which is now considered cryptographically weak due to advances in computing power.
• AES supports larger key sizes (128, 192, and 256 bits), providing significantly higher security than DES.
• AES employs a 128-bit block size, compared to DES’s 64-bit block size, enhancing data security and resistance to certain attacks.
• AES uses 10, 12, or 14 rounds depending on key size, whereas DES uses 16 rounds, but AES’s round function is more complex and secure.
• The paper concludes that AES is more secure and efficient than DES for securing modern distributed systems.
• The review highlights that symmetric key cryptography remains a critical component in securing distributed systems due to its speed and efficiency, especially when properly implemented with modern algorithms like AES.