April 2025 monthly summary for Matziaz/TE2002B. Focused on delivering foundational AES decryption capabilities and improving code quality. Key work included refining and standardizing the Inverse ShiftRows implementation and advancing the decryption pipeline architecture. Key deliverables: - AES Inverse ShiftRows Implementation and Refinement: Renamed ShiftRows.vhd to InvShiftRows.vhd, refined behavior, and updated documentation to ensure correct inverse operation and clearer maintenance signals. Commits: 20feef1aaa8b4a2c97c43cbe8d8b3e3c321334bc; 534540261b247a04bfe34a327b6e88f79dea15b1. - AES Decryption Core Modules: Introduced core VHDL components for a full AES decryption pipeline (AddRoundKey, CipherKey, InvMixColumns, InvShiftRows, InvSubBytes, KeySchedule, Mux2to1, StateMach) and a Top-level orchestrator. Commit: f0d32f8ca022a03fbb0581fa185c65e3e16a05d3 (Add files via upload). Overall impact: - Established a scalable, modular architecture for end-to-end AES decryption, enabling faster integration and testing in subsequent sprints. - Improved code quality and maintainability through explicit naming, documentation, and modularization. Technologies/skills demonstrated: - VHDL design and RTL-level implementation for cryptographic primitives - AES algorithm concepts (ShiftRows/Inverse ShiftRows, decryption pipeline stages) - Modular architecture, documentation discipline, and version-control rigor.