Secure File Encryption with EE-AES

Secure communication applications rely heavily on strong encryption algorithms to ensure confidentiality and integrity. Traditional AES provides robust security, but known structural patterns in the S-Box and predictable transformations in MixColumns make it a target for advanced cryptanalysis. This paper proposes an Enhanced Encryption AES (EE-AES) algorithm that replaces the MixColumns operation with a Bitwise Reverse Transposition (BRT) technique and introduces a Dynamic S-Box generated per session. These modifications increase diffusion, reduce predictability, and minimize vulnerability to algebraic attacks. The proposed system is implemented as a secure multi-platform communication application supporting encrypted text messaging. Preliminary results from the completed encryption module indicate improved randomness and stronger resistance to differential and linear analysis. Decryption implementation is in progress.