A Text Encryption Approach for IoT Devices to Prioritize Security and Efficiency

Encryption techniques are commonly used to protect the information, ensuring not only privacy but also data authentication, integrity, confidentiality, and availability. The security of these techniques depends on both the internal structure of the algorithm and the underlying mathematics. A crucial factor in the strength of the technique is the secret key if the key is compromised, the encryption technique becomes ineffective. Therefore, choosing the type of information used as a key, how the private key is distributed, and how the communication key is protected are all critical factors in encryption techniques. This work proposes a symmetric key algorithm to protect text messages, using a variable-size key that can be in the form of a number or text.