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Advanced Encryption Standard AES-128/256 What is the AES Hardware Accelerator?  The AES hardware accelerator (AES) on the STM32L4S5ZI microcontroller encrypts or decrypts data, using an algorithm and implementation fully compliant with the advanced encryption standard (AES). The peripheral supports CTR (Counter Mode), GCM (Galois Counter Mode), GMAC (Galois Message Authentication Code), CCM (Counter with CBC-MAC), ECB (Electronic Codebook), and CBC (Cipher Block Chaining) chaining modes for key sizes of 128 or 256 bits.  The AES Hardware Accelerator contains a  256-bit register for storing the Cryptographic Key (8 * 32-bit registers) and a 128-bit register for storing the Initialization Vector (4 * 32-bit registers). It also has a 32-bit buffer for data input and output. AES Hardware Accelerator Registers The AES Hardware Accelerator uses registers for Controlling and Monitoring the status of the peripheral. In addition to that, it has registers to input Data, output Data and store Cry

What is AESecureIO? AESecureIO is an embedded system application developed on an STM32F401RET6 Nucleo-64 Development Board. It encrypts user-input data using AES-128 in Cipher Block Chain (CBC) Mode and stores it securely on an SD Card using the SDIO Interface. The application also supports the retrieval and decryption of data from the SD Card. This device utilizes the STM32F401 Microcontroller's SDIO (Secure Digital Input/Output) interface and the USART (Universal Synchronous/Asynchronous Receiver/Transmitter) peripheral. The SDIO interface manages data transfer between the microcontroller and the SD Card, while the USART peripheral enables data input and output through a serial monitor, such as PuTTY. The advantage of this device lies in the centralized approach to data encryption and decryption. By using a single point of encryption and decryption with a predefined 128-bit key , the device ensures that data retrieval can only be performed through it. This method grants the use