ABSTRACT: Secure communication and data protection are now top priorities in the digital age. In today’s world, everything is running online and a lot of data are transferred over the internet, so data security had become an important issue. Even if one doesn’t send a file, hackers can get into the systems and access private data. There exist numerous encryption techniques using symmetric and asymmetric cryptographic technique. The primary objective of cryptography is to protect information from various types of security breaches. To enhance their resilience, most cryptographic techniques modify parameters such as key size, number of iterations, and incorporation of S-boxes. AES (Advanced Encryption Standard) is yet one of the prominent cryptographic algorithms of the 21st century with the reputation of excellent performance and reliability. AES revolves around the S-Box, a nonlinear substitutive table that is essential to attain the level of crypto-security. Substitution-boxes (S-Boxes) are important non-linear components in block cryptosystem, which play an important role in the security of cryptosystems. Constructing S-Boxes with a strong cryptographic feature is an important step in designing block cipher systems. In this analysis, A novel S-box based Advanced Encryption Standard Technique for Improved data security is presented. The performance of this technique is measured in terms of delay, memory usage and Linear Probability (LP).