{"id":160768,"date":"2025-04-25T23:03:59","date_gmt":"2025-04-25T17:33:59","guid":{"rendered":"https:\/\/www.electronicsforu.com\/?p=160768"},"modified":"2025-04-25T23:04:36","modified_gmt":"2025-04-25T17:34:36","slug":"iot-security-system-with-aes-encryption","status":"publish","type":"post","link":"https:\/\/www.electronicsforu.com\/electronics-projects\/iot-security-system-with-aes-encryption","title":{"rendered":"IoT Security System With AES Encryption"},"content":{"rendered":"
\n
\"EFY<\/figure><\/div>\n\n\n

In the era of interconnected devices, securing IoT systems is paramount to protect sensitive data from unauthorized access. This project demonstrates an IoT Security System<\/strong> leveraging AES (Advanced Encryption Standard)<\/strong> encryption to transform plain-text data into a “secret code” that only authorized users can decipher. <\/p>\n\n\n\n

By integrating AES with an IndusBoard Coin, we ensure that data transmitted over Wi-Fi, such as sensor readings or user messages, remains confidential and tamper-proof. The system aligns with the IndusBoard Coin Security System<\/strong> concept, emphasizing robust encryption for IoT applications.<\/p>\n\n\n\n

AES is a symmetric encryption algorithm widely used for its efficiency and strength. Here, we use it to encrypt data on the Coin board, which supports hardware-accelerated AES via its cryptographic engine. This project evolves in two parts:<\/p>\n\n\n\n

    \n
  1. A standalone encryption demo using AES-256.<\/li>\n\n\n\n
  2. An IoT sender-receiver system with a web UI for encrypting and decrypting messages in AP\/STA mode.<\/li>\n<\/ol>\n\n\n\n

    Supported on any board and CHIP that features built-in AES hardware acceleration. The IndusBoard Coin Security System<\/strong> could theoretically integrate with IoT, using AES alongside secure elements like the ATECC608A for key storage, though this project focuses on software-based AES for simplicity.<\/p>\n\n\n\n

    AES (Advanced Encryption Standard)<\/strong> is a symmetric encryption algorithm established by the U.S. National Institute of Standards and Technology (NIST) in 2001. It is widely used to secure data in applications ranging from banking to IoT devices due to its speed, efficiency, and robust security. AES operates on fixed-size blocks of data (16 bytes or 128 bits) and supports key sizes of 128, 192, or 256 bits\u2014here, we use AES-128 and AES-256 variants.<\/p>\n\n\n\n

    How AES Works<\/strong><\/h2>\n\n\n\n
      \n
    1. Key Expansion<\/strong>: The encryption key (e.g. 32 bytes for AES-256) is expanded into a set of round keys using a key schedule. Each round key is used in subsequent transformation steps.<\/li>\n\n\n\n
    2. Encryption Process<\/strong>:\n