During April 2025, Matziaz enhanced the Matziaz/TE2002B repository by developing core AES cryptographic features using VHDL and digital design principles. He implemented the AddRoundKey operation for both encryption and decryption, integrating it into the Encryptor and Decryptor modules with robust control and finish signaling. His work included refactoring for naming consistency, particularly supporting inverse operations like InvAddRoundKey, which improved maintainability. Matziaz also delivered the InvMixColumns transformation for AES decryption, handling Galois Field multiplications and per-byte state changes to align with cryptographic standards. The updates focused on stability, code clarity, and future extensibility without introducing new bugs.