1. A. Kahate. Cryptography and Network Security. Second Edition, Tata McGraw-Hill, 2009.
2. C. K. Shyamala, N Harini and Dr T R Padmanabhan. Cryptography and Security. Second Edition, Wiley India Pvt. Ltd., 2012.
3. Behrouz A. Forouzan. Cryptography & Network Security. Special Indian Edition, Tata McGraw-Hill, 2007.
4. E Surya, C. Diviya. "A Survey on Symmetric Key Encryption Algorithm". International Journal of Computer Science & Communication Networks, Volume 2(4), 475--477
5. S. Chandra, S. Bhattacharyya, S. Paira, S. S. Alam, "A study and analysis on symmetric cryptography", International Conference on Science Engineering and Management Research (ICSEMR), ISBN: 978-1-4799-7614-0, November 27-29, 2014, pp. 1--8, IEEE, DOI: 10.1109/ICSEMR.2014.7043664