Data security is paramount in ensuring the protection, availability, and integrity of sensitive information, especially with the rapid growth in data storage on digital platforms. With the rise of 6G networks, which promise ultra-low latency, massive connectivity, and high bandwidth, securing data transmission has become more challenging. This study offers a comparative analysis of various encryption algorithms such as DES, RSA, AES, Blowfish, ECC, and 3DES, evaluating their effectiveness in addressing security concerns in 6G networks. The study explores the strengths and limitations of these algorithms in the context of high-speed, scalable, and energy-efficient communication. As 6G networks integrate more advanced technologies like AI and IoT, the demand for robust and adaptive encryption techniques increases. This research aims to identify the most suitable encryption methods for the evolving landscape of 6G communication, ensuring data confidentiality and security. The findings contribute to a deeper understanding of encryption performance, providing insights into optimizing cryptographic strategies for next-generation networks.