Final answer:
The student needs to write a code that uses the AES algorithm to encrypt data on an Arduino platform, ensuring that repeated inputs produce different outputs by using techniques like an initialization vector (IV).
Step-by-step explanation:
The student is asking for help with writing a code that encrypts data using the AES algorithm and is intended to run on an Arduino platform. The AES (Advanced Encryption Standard) is a symmetric encryption standard that provides confidentiality by encrypting data with a secret key. When encrypting different inputs (like random words), it's common to use modes of AES that ensure a unique output for each input, even if the input repeats. Modes like CBC (Cipher Block Chaining) introduce an initialization vector (IV), which should be unique for each encryption operation to achieve this effect. The IV adds randomness to the encryption process, so even if the same word is encrypted multiple times, the output will differ each time as long as a new IV is used.
For Arduino, implementing AES encryption will typically involve using a library that supports these functionalities, as manually implementing cryptographic functions is error-prone and not recommended for production systems. The student's code would have to include the setup of the AES key, the generation of a unique IV for each operation, and the appropriate call to the library's encryption function to encode the input words.